PHASE – III (PART– 1)
NATIONAL LAW UNIVERSITY,ODISHA
CHAHATA, TULASIPUR
CUTTACK
TENDER DOCUMENT FOR CONSTRUCTION OF
NATIONAL LAW UNIVERSITY CAMPUS WORKS
(PART– A)
NAME OF THE WORK : EXTERNAL DEVELOPMENT WORK
OF NATIONAL LAW UNIVERSITY
PHASE – III (PART– 1)
A (Completion by 3 Month)
B (Completion by 21 Month)
PLACE OF SUBMISSION : At the office of the
OF THE TENDER PAPER The Registrar
National Law University ORISSA .
Chahata, Tulasipur,
Cuttack - 753008, ODISHA
ARCHITECT:
M/S. RATH ARCHITECTONIC
PLOT NO. 104, MADHUSUDAN NAGAR
UNIT – 4, BHUBANESWAR-751001
PH NO.-(0674)2390940,2395340.
1
CONTRACTOR NLUO
CONSTRUCTION OF
NATIONAL LAW UNIVERSITY CAMPUS WORKS
INDEX
Sl.No. Description Page No.
1. Index 02
2. Tender Notice 03-12
3. Form of tender 13-18
4. Format of guarantee for anti termite treatment 19
5. Format for water proofing work 20
6. General rules & instruction for the
7. guidance of tender 21-23
8. Appendix 24-25
9. Instruction to tender 26-30
10. General conditions of contract 30-54
11. Special conditions of contract 55-60
12. Safety code 61
13. Maintenance of records 62
14. Mobilisation of Advance 62-63
15. Letter of Acceptance 65
16. Performa for performance
Bank guaranty & security deposit 65-66
17. Form for mobilization advance 67-69
18. Bank guaranty for performance 70-71
19. Performa of monthly progress reports 72
20. Receipt of material at site 73
21. Performa of cube test 74
22. Performa of measurement book 75
23. Performa of Running bill form 76
24. Form for secured advance 77-78
25. Form for payment of advance on materials 79-81
26. Memorandum for payment 82-83
27. Performa of site order book 84
28. Performa for applications by
contractor for extension of time 85
29. Performa of hindrance register 86
30. Technical specification of materials 87
31. Model rules for the protection of health and
sanitary arrangements or workers 319
32. Testing of material 335
33. Schedule of quantity (BOQ)
34. List of the tender drawings
2
CONTRACTOR NLUO
NOTICE INVITING TENDER
National Law University ORISSA invites sealed tenders from the contractors on item rate basis
for the Construction of National Law University Campus Works of external development for
the proposed National Law University Campus at Naraj, Cuttack, ODISHA. Details of tenders
are as under.
a. Name of the work : Construction of External development work
of National Law University , Orissa
Campus .
b. Time allowed for completion : 24(Twenty four) Month for the total works
from the date of issue of LOI.
Brief division of work will be done as follows :
Division of Phase-III
Phase-III (Part – I)
Time period to be fixed 24 (twenty four) months for Phase-III work, which includes the
following the Part (A) and Part (B) work with operational from the date of execution of work as
per the following
Part (A) to be completed by 3 (three) Month from the date of issue of LOI.
(I) All External Development :
(a) Road (partly as per the drawing shown), Culvert & Security Goomty, and
gate.
(b) Sewerage & Drainage (Temporary)
(c) Septic Tank (Temporary)
(d) Rain water collection sump cum pump house.
(e) External Electrical (Partially)
(f) Rain Water Pit (One Nos.)
(g) Sand Filling (Boys Hostel, Girls Hostel and Academic block)
(h) External Tele-Communication (Partially)
(i) Boundary wall,Gate,security cabin,Police out post(Partly as shown in
drawing)
Part (B) to be completed by 21 (twenty one) months from the date of issue of LOI.
Phase-III (Part –II)
(I) All External Development :
(a) Road (Rest), Culvert & Security Goomty and Gate.
(b) Sewerage & Drainage
(c) Boundary wall,Gate,security cabin,Police out post
(d) Rain water collection sump cum pump house.
(e) External Electrical (Rest)
3
CONTRACTOR NLUO
(f) Rain Water Pit (One Nos.)
(g) Sand Filling (Boys Hostel, Girls Hostel and Academic block)
(h) External Tele-Communication
(i) S.T.P. 150 K.L.D (2 Nos).
(j) Under Ground Reservoir
(k) Over Head Tank cum pump house.
(l) Water Supply
(m) Sand Filling (rest Building and areas development)
(n) Sports Ground & Landscaping
(o) External Tele-Communication
(p) Parking.
(q) V.A.T with pump house.
(r) Fire fighting U.G. Sump with pump house.
c. Earnest money deposit : Rs. 45,00,000/-(Rupees forty fiveLacks
Only).
d. Security deposit : 5% of the contract value
.
e. Cost of Tender document : Rs 20, 000.00. (Rupees Twenty thousand
only)
f. Last date & time of receipt of tender : 11.10.2011 at 2 P.M.
g. Pre bid meeting 07.10.2011 At NLUO, Naraj Site at 11
A.M.
h. Address at which the tenders are to be
submitted : The Registrar .
National Law University ORISSA .
Chahata, Tulasipur,
Cuttack - 753008, ODISHA
i. Date & time of opening tenders 11.10.2011 at 3 P.M (14Hrs)
j. Place of opening tenders: At the office of the
The Registrar .
National Law University Orissa .
Chahata, Tulasipur,
Cuttack - 753008, ODISHA
k. Validity of offer. 6 (six) months from the opening of price
bid.
l. Liquidated Damages. 0.5% of the estimated contract value shown
in the tender per week subject to a
maximum of 5% of the accepted tender
amount.
In case the date of opening of tenders is declared as a holiday , the tenders will be opened on the
next working day at the same time.
National Law University Orissa has the right to accept/ reject any / all tenders without assigning
any reasons.
4
CONTRACTOR NLUO
For and behalf of National Law University Orissa .
Technical Bid Criteria
Reputed contractors who successfully executed similar works may apply on or before
11.10.2011 their tender can only be opened.
1. Basic criteria for pre-qualification of contractors/Firms:
a. Intending contractors/firms should have minimum 7 years experience
in the construction field.
b. Intending contractors/firms should have successfully completed one
similar type of works in for Government/PSUs/ CPWD/PWD (State),
reputed corporate etc. during last seven years.
c. Intending contractors/firms should have successfully completed
similar type of works as under as on 31.03.2011 for Government/PSUs/
CPWD/PWD (State)/ reputed corporate etc. during last seven years. :
i. Two similar works each costing not less than Rs.20.00 Crs. or
ii. One similar works costing not less than Rs.40.00 Crs.
Similar work means RCC frame structure, General civil, plumbing, PH work,
electrical works of building and external development work for
Government/PSUs/ CPWD/PWD (State)/ reputed corporate etc.
d. Intending contractors/firms should be financially capable and should submit
solvency certificate for an amount of Rs.25 Crs. from any Scheduled Bank.
e. Intending contractors/firms should have average annual financial turnover
during the last three years, ending as on 31.03.11 for construction works
should be at least Rs. 100Cr.
f. Intending contractors/firms must have sufficient experienced personnel,
technical knowhow, establishment, plant/equipment to complete the project
well in time.
2. The interested Contractors/firms may apply in the prescribed format (as per
Annexure I)
The eligible Contractors/firms may obtain prescribed format form
a. Office of the The Registrar, National Law University Orissa, Chahata,
Tulasipur, Cuttack - 753008, ODISHA (from 10 AM to 5 PM from Monday
to Friday and 10 AM to 2 PM on Saturday) or
b. May be downloaded from the WEBSITES www.nluo.ac.in
The prescribed format duly filled in with all necessary particulars as stated in the
prescribed format along with attested copies of certificates/credentials regarding jobs
undertaken at various organizations should be submitted in a sealed cover super
scribing “Prequalification of Contractors for construction of External Development
work at NLUO” at the following address on or before 11.10.2011The Registrar,
National Law University Orissa.
Chahata, Tulasipur, Cuttack - 753008, ODISHA.
3. Selection will be made based on particulars and documents furnished by the
applicant as required and satisfactory verification carried out by the Architect /
NLUO. Incomplete information in the application will lead to summary rejection. If
any information furnished by the applicant is found incorrect at a later stage, they
5
CONTRACTOR NLUO
shall be liable to be debarred from tendering/taking up the work. NLUO reserves the
right to verify the particulars furnished by the applicant independently.
4. Issue of tender documents to the Contractors/firms will be restricted to those
considered eligible from the applicant and no further press notice in this regard will
be issued. NLUO reserves the right to accept or reject any or all applications without
assigning any reasons whatsoever.
5. For any other clarifications, intending agencies may contact at the Registrar above
mentioned address before the last date of submission during working hours as
mentioned above.
6. Incomplete applications and applications not filled properly with requisite details are
liable for rejection and NLUO will not entertain any further communication in such
cases.
7. The NLUO reserves the right to accept or reject any or all applications without
assigning any reasons whatsoever.
8. Pre-bid meeting with all contractors shall be held at NLUO site Office at Cuttack,
ten days from issue of publication on dt 11.10. 2011 at 11.00 AM at NLUO site
office at Cuttack, wherein contractors can clarify any doubts /discrepancies in
documents drawings , and indicate only missing or any item taken extra in the
description of item, drawings or any details conveying different meaning at different
places, other missing details or any missing item in Drawings/ Specifications /
Conditions. All queries needs to be put up in writing to the “ The Registrar, NLUO,
Cuttack within 7 days from the date of issue of this document. No further
clarifications shall be given by NLUO and contractor shall not claim any extra
payment in future. Also contractor shall not be entitled for any claim on such issues
at later date.
All the queries should be brought out during the Pre-bid meeting only in writing.
All the queries shall deliberated and corrective action if any shall be taken during the
Pre- Bid meeting.
9. No interest shall be paid on Earnest Money Deposit and Retention money or any
other securities.
The Registrar
National Law University ORISSA.
Chahata, Tulasipur,
Cuttack - 753008, ODISHA
6
CONTRACTOR NLUO
ANNEXURE -I
PARTICULARS OF THE FORM TO BE
FURNISHED FOR THE PURPOSE OF
PRE-QUALIFICATION OF CONTRACTORS/FIRMS.
1) Name of the Organization
2) Address
3) Year of Establishment
4) Status of the firm
(Whether Company/Firm/Proprietary)
5) Name of Directors/Partners/Proprietor.
i)
ii)
iii)
6) Whether registered with the Registrar of Companies/
Registrar of Firms. If so, mention number and date.
7) a) Name and address of Bankers.
i) ii)
iii) iv)
b) Enclose Solvency Certificate from the Bankers.
c) Furnish the details of NPA or dispute with Bankers, if any.
8) Whether registered for sales tax purposes. If so, mention number and date. Furnish
also copies of sales tax clearance certificate.
9) Whether an assessee of Income Tax. If so, mention permanent account number.
10) Furnish copies of audited Balance Sheet and Profit & Loss Account (Audited) for the
last three years i.e., as on 31.03.10, 31.03.09 & 31.03.08.
7
CONTRACTOR NLUO
11) If you are registered in the panel of other Organizations/Statutory Bodies, such as
CPWD, PWD.MES, Banks etc., furnish their names, category and date of registration.
i) ii)
iii) iv)
v) vi)
12) Detailed description and value of works done during last 7 years
(As per proforma – 1 in a separate sheet)
13) Specify turnover in last 3 years. In Rs. Lakhs
2010-11
2009-10
2008-09
14) Furnish the names with address of three responsible persons who will be in a
position to certify about the quality as well as past performance of your organization.
i)
ii)
iii)
15) Furnish the details of the litigation, if any, with the employers.
16) Other relevant information (As per proforma – 2 & 3)
It is certified that the information furnished is authentic. We understand that the Bank reserves
the right to reject any or all applications without assigning any reasons thereof.
Date: (Signature of the applicant)
Including title & capacity
In which application is made with seal.
Place:
Note: Where copies are required to be furnished these is to certified copies preferably by
the concerned agencies or a Government Officer.
8
CONTRACTOR NLUO
Enclosure to Annexure I
PROFORMA – 1
PARTICULARS IN RESPECT OF WORKS EXECUTED DURING LAST 7 YEARS (See
the note below)
Sl Name of Short Name & Value of Stipulated time Actual time Name of
No work/Project Description Address Work of Completion of Architect/
with Address of work of Executed With date of Completion Consulting
Executed Owner commencement with date Engineer
of with Phone
completion &
Mobile no.
1 2 3 4 5 6 7 8
Note: Attested copies of work completion certificates issued by the employer to be
enclosed for verification by the NLUO.
Name and Signature with Seal
Enclosure to Annexure I
PROFORMA – 2
KEY PERSONNEL PERMANENTLY EMPLOYED.
Sl Name Designation Qualification Experience Years Any
No. With the other
Firm
1 2 3 4 5 6 7
Name and Signature with Seal
9
CONTRACTOR NLUO
Enclosure to Annexure I
PROFORMA – 3
OTHER RELEVANT INFORMATION
SL. No. Particulars
i) WORK FORCE
Permanently Employed No. Any other Years with the firm.
a) Masons.
b) Civil Engineers.
c) Mechanics.
d) Electricians
e) Mate/Helpers
f) Others.
ii) WORKSHOP FACILITIES.
Location Land Area Type of Structure Type of Facilities.
a)
b)
iii) LIST OF MAJOR CONSTRUCTIONAL EQUIPMENT
IN POSSESSION OF THE FIRM. (Please furnish in detail)
Name and Signature with Seal
10
CONTRACTOR NLUO
TENDERS SHOULD BE SUBMITTED AS FOLLOWS :
1. Tenders are to be submitted on the printed forms issued by us. The Contractor should
quote the rates in figures as well as in words. Special care should be taken to write the
rates in figures only in such a way that interpolation is not possible. The total amount
should be written both in figures and in words . In case of figures, the words . “Rs”
should be written before the figure of rupees and words “p” after the decimal figures e.g.
Rs. 2.15 “p” and incase of words, the words the word “Rupees” should precede and the
word “Paise” should be written at the end, Unless the rate is in whole rupees and
followed by the words “only” it should invariably be upto two decimal places . While
quoting the rate in schedule of quantities , the words “Only” should be written closely
following the amount and it should not be written in the next line. The amount of each
item shall be worked out and the requisite total shall be given. All corrections shall be
attested by the initials of the Tenderers . In case of any discrepancy / difference, the rate
quoted in words in the original copy of the tender and the amount derived there from
shall prevail and be binding . If the rates in words are not written, the Tender will be
rejected.
2. Tenders which should be placed in sealed cover with the name of the project and date of
opening of tender written on the envelopes will be received by the office of the
Registrar, National Law University ORISSA, Chahata, Tulasipur, Cuttack - 753008,
ODISHA Upto 11.10.2011 at 2 P.M hrs in a sealed envelope of appropriate size
containing the documents as under :
3. ENVELOPE MARKED “PART-A”
Envelope marked “PART-A” shall contain the following Documents :
a. Forwarding letter without mentioning the cost of Tender value arrived at with
quoted rates.
b. Earnest money deposit furnished in the form of Crossed demand Draft / Banker‟s
cheque drawn in favour of “The Registrar, NATIONAL LAW UNIVERSITY
ORISSA ” and payable at Cuttack for the amount indicated in the Notice
Inviting Tender.
c. Any comment which the tenderer desires to make in the form of a statement as
brief as possible and with reference to the items.
d. Latest three years photocopies of upto date Income Tax and Sales tax Clearance
Certificate.
e. The term and conditions which are of commercial and technical nature if any that
the tenderer wishes to stipulate.
f. Any other papers the tenderers wishes to submit.
g. Nothing on previous experience, whether A,B or C
11
CONTRACTOR NLUO
h. Class contractor submission of documents showing:
1. Nature and names of those the firm, if a partnership whether registered.
2. Previous project done with documentary support.
4. ENVELOPE MARKED “PART-B”
Envelope marked” PART-B” shall contain the Priced Tender Volume in duplicate –
Marked “ORIGINAL” & “DUPLICATE”, on the body of the tender paper issued Non
compliance of this provision may result in rejection of the tender .
5. ENVELOPE MARKED “PART-C”.
Envelope marked No-PART”A” & “B” shall be put in large envelope of adequate size
marked “PART-C” which shall be properly sealed. This envelope, which shall be,
endorsed on the outside face “TENDER CONSTRUCTION OF EXTERNAL
DEVELOPMENT OF NATIONAL LAW UNIVERSITY CAMPUS WORKS AT
NARAJ, CUTTACK, ODISHA FOR NATIONAL LAW UNIVERSITY ORISSA ”.
Outer envelope (Marked “PART-C”) containing the separate tender documents as
mentioned herein above shall be opened in the office of the The Registrar, National Law
University ORISSA , Chahata, Tulasipur, Cuttack - 753008, ODISHA. at 11.10.2011
on 3 P.M in the presence of the representatives of the Architect and of those tenderers
who chose to remain present.
Envelope “PART-A” containing earnest money deposit shall be opened first and if the
Earnest money deposit is not found as prescribed the tender shall be rejected and other
sealed envelope will be returned unopened to the representatives of the concerned tender
if present. Then the covering letter without mentioning the tender amount arrived from
the quoted rates and other documents as specified herein above will be scrutinized and
comments/conditions which has financial implication will be evaluated and the same
may be discussed with the tenderers .
Envelope “PART-B” containing the priced tender volumes in original and duplicate will
be opened on the 19.10.2011 at 3 PM.
The acceptance of the tender will be made by the N.L.U.O. N.L.U.O will announced
the name of the person/ firm whose tender is accepted. No reason will be given for
acceptance / rejection of the tenders.
FOR AND ON BEHALF OF
NATIONAL LAW UNIVERSITY ORISSA ,
CHAHATA, TULASIPUR, CUTTACK, ODISHA
12
CONTRACTOR NLUO
ARTICLES OF AGREEMENT
(Subject to Approval by NLUO )
This agreement is made on the _____________ day of ___________2011 between
“NATIONAL LAW UNIVERSITY ORISSA” represented by its REGISTRAR
_______________ (hereinafter called “NLUO”) which expression shall include their
representatives, executors, administrators and assignees of the ONE PART AND
M/s _______________________ a Company registered under Companies Act of 1956
having its registered office at ______________________ represented by its
____________(herein called “THE CONTRACTOR”) which expression shall include
his/their heirs principle partners, executors, administrators and assignees of the OTHER
PART.
WHEREAS NLUO is desirous of constructing NLUO Project at Chahatta, Tulasipur,
Cuttack-753008, ODISHA and has caused Drawings, Specifications, terms and
conditions, Description of works , etc. describing the work to be done.
AND WHEREAS the said Drawings, specifications, terms & conditions, , Description of
works etc. have been signed by or on behalf of the parties here to.
AND WHEREAS THE CONTRACTOR has agreed and accepted to execute upon and
subject to the conditions set forth herein and to the conditions set forth in contract
conditions all of which are collectively (hereinafter referred to as “The said
Conditions”), the works shown upon the said Drawings and described in the said
specifications therein amounting to the sum of Rs.____________ (Rupees
_______________) or such other sum as shall become payable hereunder (hereinafter
referred as The Said Contract Amount).
AND WHEREAS THE CONTRACTOR has deposited Rs. _________________
(Rupees ___________________________________) as Earnest Money for the Proposed
External Development Work of NLUO, to be retained with NLUO for the due
performance of this Agreement.
NOW IT IS HEREBY AGREED AS FOLLOWS:
1. In consideration of the lump sum of Rs. ______________ (Rupees
________________) to be paid at the time and in the manner set forth in said
conditions THE CONTRACTOR will upon and subject to the said conditions
execute and complete the works shown upon the said drawings and such further
detailed drawings as may be furnished to them by NLUO and described in the
said specifications and the said Description of works including rectification of
any defect therein inconformity in all respect with the provision of the contract.
2. NLUO shall pay to THE CONTRACTOR the said Contract amount of
Rs.__________ (Rupees _________________) or such other sum as shall
become payable at the time and the manner hereinafter specified in the said
conditions as authorized by NLUO.
3. The said drawings, Description of works and conditions of contract and other
documents herein mentioned shall form the basis of this CONTRACT , and the
decision of the said NLUO as mentioned in the conditions of contract in
reference to all matters of dispute as to the materials, workmanship, the intended
13
CONTRACTOR NLUO
or interpretation of the clause of this Agreement, or any other document attached
hereto shall be final and binding.
4. The following documents shall be deemed to form and be read and construed as
an integral part of the Agreement. (Viz)
(i) This form of Agreement.
(ii) Letter of Intent _____________dt. ______________
(iii) Tender schedule, Notice Inviting Tender, Form of Tender, Conditions of
Contract, Specifications and Tender Drawings.
(iv) Following Correspondence.
(a) __________________________
(b) __________________________
and the parties hereto will respectively abide by and submit themselves to the
Conditions and stipulations and perform the agreements on their parts
respectively in such conditions, specifications.
5. NLUO AND THE CONTRACTOR bind themselves, their partners, and
successors in interest, executors, administrators and assigns of administers and
assigns of such other party in respect of all covenants of this Agreement.
6. The said contract comprise the works above mentioned and all subsidiary works
connected therewith within the same site, as may be ordered to be done from time
to time by the said NLUO even though such works may not be shown on the
drawings or described in the said specifications or the Description of works but
may be fairly intended for Successful completion & functioning of the project.
This is a fixed cost contract and no escalation is payable. Abnormal increase in
the cost of materials or abnormal delay in completion of the project shall not be
compensated for by escalation. It is explicitly instructed that the Civil Contractor
shall provide for all necessary assistances as supply of tools, machinery,
scaffolding materials to all and such other agencies directly engaged by NLUO
in time for the execution and completion of the Works.
7. NLUO reserves to himself the right of altering the drawings and nature of work
and of adding to or omitting any items of work or of having portions of the same
carried out departmentally or otherwise be carried out without prejudice to this
contract and the contractors shall not be entitled to any remuneration or
compensation on such work. NLUO reserves the Option of supplying Cement,
Steel, finishing materials like Tiles, factory fabricated Windows with grilles and
glass and such other materials/ items as preferred by NLUO at the appropriate
time at the agreed rate and deduct it from the contract value. The contractor shall
not have any right to object to same.
8. The contractor shall not assign, sublet or transfer his/their interest in this
agreement without the written consent of NLUO.
9. The contractor shall afford every reasonable facility to the representatives of the
said NLUO for inspection, checking or otherwise to the site to enable them to
find out the actual carrying out of all works in the manner laid down in the said
conditions.
14
CONTRACTOR NLUO
10. If the Contractor shall fail to comply with any of his obligations hereunder or
shall he wind-up or his business shall be dissolved or any receiver is appointed or
any attachment is made in respect of any of his properties or the Contractor shall
otherwise fail or neglect to complete the said work within the stipulated period,
then or on the happening of any such event the “NLUO” shall be entitled to
cancel this Contract and to get the unfinished work done at the cost & risk of the
Contractor by a third party & if NLUO suffers any Losses in this regard NLUO
shall look to the contractor for the same viz., payment or reimbursement to such
losses. The decision of the said NLUO in regard to the quantum of such losses
will be final and binding on parties hereto. Upon such termination of this
Contract or there shall be adjustment of any payment made to the Contractor by
NLUO the Contractor shall, if required refund any such amounts to NLUO.
11. Time shall be considered as the essence of this CONTRACT and THE
CONTRACTOR hereby agrees to commence the work in accordance with the
said conditions and to complete the entire and all the works connected thereto or
as ordered from time to time within the time period stipulated herein and to
execute the same diligently and consistently throughout the entire time period so
specified and the Contractor shall strictly adhere to the detailed programme for
completion of work.
12. All disputes arising out of or in any way connected with this agreement shall be
deemed to have arisen in Cuttack and only the courts of Cuttack shall have
jurisdiction to determine the same.
13. All payments by NLUO under CONTRACT will be made at NLUO, Office of
“The Registrar” NLUO . The Contractor is required to open a Bank account in
the same bank as of NLUO for timely payments.
14. It is the responsibility of the contractor to ensure timely depositing of sales tax on
work contract tax as per the prevailing rate during the tenure of contract period.
The contractor shall be responsible for any delayed/partial payment of WCT,
VAT, service Tax and all other taxes as required under statute and other
prevailing laws.
15. As per Service Tax rules, applicable on construction, Service Tax is to be paid by
the service provider (the contractor in this case). As per section of the Central
Exercise act 1944, as extended to Service Tax, every person making Service Tax
payments, shall be presumed to have passed on the incidence of such tax to
client, availing the taxable service. Accordingly Service Tax incidence. %
(Prevailing rates) has been passed. This statutory liability will be deposited by us
along with each RA Bill and challan shall be submitted to NLUO on before
submitting next bill, In case Service Tax rate is reduced / scrap than Service Tax
loaded in the lump-sum contract value shall be reimbursed to NLUO.
16. Contractor shall provide the vouchers for full quantity of any of the material
brought for the project whenever asked by NLUO and be inclusive of Service
tax and VAT in the rates.
17. The contractor will carry out the testing of any of the materials at his own cost
from a recognized laboratory as approved by NLUO as per the relevant IS Codes
before it is used in the work.
15
CONTRACTOR NLUO
18. As per Terms & Condition of Contract, increase/decreases in Cement & Steel
price/cost above the price band prescribed in the contract shall be
reimbursed/recovered by NLUO, subject to fulfillment of contractor condition.
Necessary deduction towards Income tax & WCT shall be deducted and
deposited. The effect of this has been loaded in contract value and no additional
amount/claim is payable by NLUO.
19. All parts of this contract have been read to us and fully understood by us.
As witness thereof the parties hereto have hereunto set their hands the day and
year first above written.
Signed by the said NLUO: ____________________________
In the presence of witness:
Name: ________________________ Name: _______________________
Occupation : ___________________ Occupation : ___________________
Address : ____________________ Address : ____________________
Signed by the said CONTRACTOR : ___________________________________
In the presence of witness:
Name: ________________________ Name: _______________________
Occupation : ___________________ Occupation : _______________
Address : ____________________ Address : ____________________
16
CONTRACTOR NLUO
FORM OF TENDER
To
The Registrar
National Law University ORISSA ,
Chahata, Tulasipur, Cuttack - 753008, ODISHA.
Sub : Tender for Construction of National Law University Campus Works for National Law
University ORISSA at Naraj, Cuttack, ODISHA.
Dear Sir,
I/We, have seen the site, read and examined and clearly understood the content in the following
documents related to the Construction of National Law University Campus Works for National
Law University Orissa at CUTTACK, ODISHA.
a) Notice Inviting Tender.
b) Instruction to the Tenderers.
c) Articles of Agreement.
d) General conditions of contract.
e) Special conditions of contract.
f) Particulars specifications and special clauses forming part of schedule of quantities.
g) Drawings.
h) Modifications/Amendments to the tender documents if any.
I/We hereby tender for execution of the works referred to in the aforesaid document upon the
terms and conditions contained or referred to there in and in accordance in all respects with the
specifications, designs, drawings and other relevant details at the rates quoted in Bill of Quantity
and within the period of completion as stipulated in schedule.
In consideration of I/We being invited to tender, I/We agree to keep the tender open for
acceptance for 6 months from the due date of submission there of and not to make any
modifications in its terms and conditions which are not acceptable. A sum of Rs--------------------
----------------------------------------------------------is hereby forwarded in the form of demand
draft No. ---------------- -----dt.------------------ issued by --------------------------(name of Bank)
as earnest money in favour of National Law University ORISSA which amount is not to bear
any interest. If I/We fail to keep the tender open as aforesaid or make any modifications in the
terms and conditions of the tender which are not acceptable to National Law University
ORISSA , I/We agree that National Law University ORISSA shall without prejudice to any
other right or remedy be at liberty to forfeit the said earnest money absolutely. Should this
tender be accepted, I/We hereby agree to abide by and fulfill all the terms and conditions and
provisions of the aforesaid documents.
17
CONTRACTOR NLUO
If after the tender is accepted, I/We fail the commence the execution the works as provided for
in the terms and conditions of contract. I/We agree that National Law University ORISSA shall
without prejudice to any of their rights and remedies, be at liberty to forfeit the said earnest
money absolutely.
Witness----------------------------- signature in the capacity of -------------------------------
date ------------------------ Duly authorize to sign the tender on behalf of ------------------------------
-----------------------------------
Address----------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------
-----
Time --------------------------------
Dated-------------------------------
Telephone No.-----------------------------------------
------------------------------------------.
(Seal)
Tender submitted on ----------------------------------- Before -------------------------------------------
P.M.
18
CONTRACTOR NLUO
“ANNEXURE-A.”
FORMAT OF GUARANTEE TO BE EXECUTED BY THE FIRM /
CONTRACTOR IN RESPECT OF THE WORK OF PRE- CONSTRUCTION
ANTI-TERMITE TREATMENT.
This agreement made this ................................. day of ................................... Two thousand ten
................................................ Between National Law University ORISSA , Constituted under
the Govt. of ODISHA Act - 4 of 2008. having its head office at Chahata, Tulasipur, Cuttack -
753008, ODISHA, of the one part. (Herein after called “the NLUO”).
WHEREAS THIS AGREEEMENT is supplementary to a contractor (hereinafter called the
contract dated ......../......../ 200 ............ and made between the NLUO of the one part and the
Guarantor of the other part) where by firm/Contractor interalia undertook to render the
buildings/structures completely free from any infestation of termites. And whereas the
Guarantors agreed to give guarantee to the effect that the said buildings/structures shall remain
free from any infestation of termites for a minimum period of ten years from the date of
completion of pre-construction anti-termite treatment carried out as per the relevant I.S. Code
Now the Guarantor hereby agree to make good all defects and render the buildings / structures
free from any infection of termites, during this period of guarantee and to the satisfaction work
at his own cost, and within one week from the date of issue of notice from the NLUO, calling
upon him to rectify the defects. In case the guarantor fails to commence the work as per above
notice and the work is got done through some other contractor. That if the Guarantor fails to
execute the pre-construction anti-termite treatment or commits breach there under than the
Guarantor will indemnify the principal and his successors against all loss, damage cost, expense
or otherwise which may be incurred by him by any reason of any default on the part of the
guarantor in performance and observance of this agreement. As to the amount of loss and / or
damage and/or cost incurred by the NLUO the decision of the NLUO will be final and binding.
In witness whereof these presents have been executed by the obligator -------------------------------
---------------------- and by ------------------------------------- and for on behalf of the NLUO on the
day, month and year first above written.
Signed, and delivered by ------------------------------------------------- (N.L.U.O) by the hand of
Shri -------------------------------------- in the presence of -----------------------------------------Signed
and delivered by the hand of -----------------------------------------------------------(Contractor) in
the presence of ------------------------------------------------------------------
19
CONTRACTOR NLUO
“ANNEXURE-B”
FORMAT OF GUARANTEE TO BE EXECUTED BY THE
FIRM/ CONTRCTOR IN RESPECT OF THE WORK
OF WATER PROOFING TREATMENT.
This agreement made this ................................. day of ................................... Two thousand ten
................................................ Between National Law University ORISSA , Constituted under
the Govt. of ODISHA Act - 4 of 2008. having its head office at Chahata, Tulasipur, Cuttack -
753008, ODISHA. of the one part. (Herein after called “the NLUO”).
WHEREAS THIS AGREEMENT is supplementary to a contract (hereinafter called the contract
dated ----/----/ 2010 and other part) where by firm/ Contractor interalia under took that the
basement with retaining walls, roofs, stair roof, underground reservoir, overhead reservoir and
sunken floors of the NLUO's Building shall be in water proof condition for a period of ten (10)
years viz. from dated of handing over of the completed works to the National Law University
ORISSA and whereas the Guarantors agree to give guarantee to the effect that the said
buildings / structures shall remain free from any leakage / seepage for a minimum period of ten
(10) years from the date of handing over of the building.
Now the Guarantor hereby agree to make good all defects and render the building / structures
free from any leakage / seepage, during this period of guarantee and to the satisfaction of the
NLUO. The guarantor also agrees to take up such rectification work at his own cost, and within
one week from the date of issue of notice from the NLUO, calling upon him to rectify the
defects. The decision of the NLUO as to the cost payable by the guarantor will be final and
binding in case the guarantor fails to commence the work as per above notice and the work is
got done through some other contractor. That if the Guarantor fails to execute the water proofing
works or commits breach there under then the Guarantor will indemnify the principal and his
successors against all loss, damage cause, expense or otherwise which may be incurred by him
any reason of any default on the part of the guarantor in performance and observance of this
agreement. As to the amount of loss and or damage and/ or cost incurred by the NLUO the
decision of the NLUO will be final and binding.
In witness whereof these presents have been executed by the obligator ---------------------- and by
---------------------------- and for on behalf of the NLUO on the day, month and year first above
written.
Signed, and delivered by National Law University ORISSA by the hands of Shri------------------
---------------------- in the presence of -----------------------------------------------------------------------
Signed, and delivered by National Law University ORISSA by the hands of Shri / M/s.-----------
---------------------------------- (Contractor ) in the presence of -------------------------------------------
-----------------------------
20
CONTRACTOR NLUO
GENERAL RULES AND INSTRUCTIONS
FOR THE GUIDANCE OF TENDERERS.
1. Tenders are hereby invited on behalf of National Law University ORISSA , Cuttack for
the Construction of National Law University Campus Works at Naraj, Cuttack, ODISHA.
2. Contract documents consisting of the plans, complete specifications, the schedule of
quantities of the various classes of work to be done, and the set of conditions of contract
to be complied with by the person whose tenders may be accepted, which will also be
found in the form of tenders is to be duly signed. The site for the work is available for
inspection with the prior permission of PMC/ NLUO.
3. Tenders for external development sealed cover, with written “TENDER OF
CONSTRUCTION EXTERNAL DEVELOPMENT WORK OF NATIONAL LAW
UNIVERSITY CAMPUS AT NARAJ, CUTTACK, ODISHA. FOR NATIONAL LAW
UNIVERSITY ORISSA ” written on the envelopes will be received by The Registrar
National Law University ORISSA , at Chahata, Tulasipur, Cuttack - 753008, ODISHA. up
to 11.10.2011 at 2 PM. and will opened by him in his office at 11.10.2011 at 3 PM on the
same day.
4. Tenders are to be on the prescribed tender documents which can be obtained from the
office of National Law University ORISSA , at Chahata, Tulasipur, Cuttack - 753008,
ODISHA on payment of Rs 20,000.00(Rupees twenty thousand only) .
The same can be downloaded from the NLUO web site www.nluo.ac.in & the amount of
20,000.00 will be paid at the time of submition of the tender document.
The time allowed for the carrying out of the work will be 24(Twenty four) months from
the date of receipt of LOI.
5. The contractors should quote in figures as well as in words the rate, and amount tendered
by them. The amount for each item should be worked out and the requisite totals given.
(a) When there is a difference between the rates in figures and in words the rate which
corresponds to the amounts worked out by the contractor, shall be taken as correct
figure.
(b) When the amount of any item is not worked out by the contractor or it does not
correspond with the rate written either in figures or in words, then the rate quoted by
the contractors in works shall be taken as correct.
(c) When the rate quoted by the contractor in figures and in words tallies but the amount
is not worked out correctly, rate quoted by the contractor shall be taken as correct
and not the amount.
6. When a contractor signs a tender in an Indian Language the tendered amount and the total
tendered should also be written in the same language. In the case of illiterate contractors
the rates or the amounts tendered should be attested by a witness.
7. The last date of Issue of tender form will be 08.10.2011 at 5 PM.
8. Earnest money, Rs. 45,00,000.00 (Fourty five lakhs only) in form DD( Demand draft) of
as mentioned herein before in favour of “The Registrar, National Law University ORISSA
must accompany each tender and each tender is to be in a sealed cover super scribed "
Tender for Construction of National Law University Campus Works at CUTTACK " and
21
CONTRACTOR NLUO
addressed to the Registrar, National Law University ORISSA , at Chahata, Tulasipur,
Cuttack - 753008, ODISHA.
9. The contractor, whose tender is accepted will be required to furnish by way of security
deposit for the due fulfillment of his contract, such sum as will amount.
Initial Security Deposit : The amount of Initial security deposit shall be 2% of accepted
tender amount including EMD. The initial security deposit is to be paid by the contractor
to the N.L.U.O within 15 (fifteen ) days of intimation to him of the acceptance of tender.
The initial security deposit will be kept in the N.L.U.O account & refunded to the
contractor without any interest along with retention money as stipulated in the contract.
From each running bill an amount at the rate of 10% of the gross value of the running bill
shall be recovered as retention money , till the total retention amount including the EMD
& ISD amounts already with the N.L.U.O become 5% of the value of the contract amount.
This amount is called as Total Security Deposit-which consists of Three components:
A] EMD- Earnest Money Deposits.
B] ISD-Initial Security Deposits.
C] RM-Retention Money.
The total security deposit will be kept with the N.L.U.O. 50% of the total security deposit
amount shall be refunded without interest to the contractor on issue of virtual completion
certificate by the PMC/ N.L.U.O & the contractor‟s removal of his materials, equipment,
labour force, temporary sheds, stores, site office etc.
The remaining 50% of the total security deposit may be refunded 15 days after the end of
defect liability period (i.e 36 months), provided the contractor has carried out all the
works & attended to rectification of all defects in accordance with the conditions of the
contract.
The Security Deposit shall be collected as detailed in clause No. 1 of the General
Conditions of the contract.
The EMD of the contractor whose tender is accepted, shall be forfeited in full in case he
does not remit the initial Security Deposit within the stipulated period or start the work by
the stipulated date mentioned in the award letter.
10. The acceptance of a tender will rest with the N.L.U.O only which does not bind itself to
accept the lowest tender, and reserves to itself the authority to reject any or all of the
tenders received without the assignment of a reason. All tenders in which any of the
prescribed conditions are not fulfilled or are incomplete in any respect are liable to be
rejected.
11. Canvassing in connection with tenders is strictly prohibited and the tenders submitted by
the contractors who resorts to canvassing will be liable to rejection.
12. All rates shall be quoted on the proper form of the tender alone.
13. An item rate tender containing percentage below/above will be summarily rejected.
14. On acceptance of the tender, the name of the accredited representative(s) of the contractor
who would be responsible for taking instructions from the NLUO/Architects shall be
22
CONTRACTOR NLUO
communicated to the NLUO with in 7 (seven) days of acceptance. The accredited person
duly qualified engineer.
15. Special care should be taken to write the rates in figures as well as in words and the
amounts in figures only, in such a way that interpolation is not possible. The total amount
should be written both in figures and in words. In case of figures, the words "Rs." should
be written before the figure of rupees and works "p" after the decimal should preceded and
the word "Paise" should be written at the end", unless the rate is in whole rupees and
followed by the words "only", it should invariably be up to two decimal places, While
quoting the rate in schedule of quantities, the work "only "should be written closely
following the amount and it should not be written in the next line.
16. The N.L.U.O does not bind itself to accept the lowest or any tender and reserves to itself
the right of accepting the whole or any part of the tender and the tenderer shall be bound to
perform the same at the rate quoted.
17. Sales tax, service tax or any other tax etc on materials or on finished works like work's
contract tax, Turn-over Tax, etc. in respect of this contract shall be payable by the
contractor and the N.L.U.O will not entertain any claim whatsoever in this respect.
18. The Contractor shall give a list of his relatives working with the N.L.U.O along with their
designations and addresses.
19. No employee from the date of the N.L.U.O is allowed to work as a contractor for a
period of two years of his retirement from N.L.U.O service, without the previous
permission of the N.L.U.O. This contract is liable to be cancelled if either the contractor or
any of his employee is found at the N.L.U.O as aforesaid before submission of the tender
or engagement in the contractor‟s service.
20. The tender for works shall remain open for acceptance for a period of 6 (six) months from
the date of opening of tenders. If any tenderer withdraws his tender before the date prior
of, then N.L.U.O shall be at liberty to forfeit Earnest Money paid along with the tender.
21. The tender for the work shall not witnessed by contractor or contractors who himself/
themselves has/have tendered or who may and had/have tendered for the same work.
Failure to observe this condition would tender of the contractor tendering as well as
witnessing the tender liable to summary rejection.
22. It will be obligatory on the part of the tenderer to tender and sign the tender documents for
all the component parts and that, after the work is awarded, he will have to enter into an
agreement for which component with the competent authority in the N.L.U.O.
23. The tenderer, apart from being a competent contractor must associate himself with
agencies of the appropriate class who are eligible to tender for (i) Electrical (ii) Sanitary
and Water supply installations and (iii) Horticulture.
The Registrar .
National Law University ORISSA .
Chahata, Tulasipur,
Cuttack - 753008, ODISHA
23
CONTRACTOR NLUO
APPENDIX
1. Name of work : Construction of National Law University
Campus Works (External development
work) at Naraj for National Law University
ORISSA .
2. Location : At: Naraj, Cuttack, ODISHA
3. Scope of work : As above and further detailed in the General
Conditions of contract.
4. Defects Liability Period : 12 (Twelve) months from issuing of date of
completion certificate.
5. Date of Commencement : Fifteen days from the date of issue of work
order or the date of handing over site, which
ever is later.
6. Time of completion : 24 (twenty four) months for the total work.
(Part – I) by 3 months and (part –II) 21
Months .
Brief the division of work will be done as follows :
Division of Phase-III
Phase-III (Part – I)
Time period to be fixed 24 (twenty four) months for Phase-III work, which includes the
following the Part (A) and Part (B) work with operational from the date of execution of work as
per the following
Part (A) to be completed by 3 (three) months from the date of issue of LOI.
(I) All External Development :
(a) Road (partly as per the drawing shown), Culvert & Security Goomty and
gate.
(b) Sewerage & Drainage (Temporary)
(c) Septic Tank (Temporary)
(d) Rain water collection sump cum pump house.
(e) External Electrical (Partially)
(f) Rain Water Pit (One Nos.)
(g) Sand Filling (Boys Hostel, Girls Hostel and Academic block)
(h) External Tele-Communication (Partially)
(i) Boundary wall,Gate,security cabin,Police out post(Partly as shown in
drawing
24
CONTRACTOR NLUO
Part (B) to be completed by 21 (twenty one) months from the date of issue of LOI.
Phase-III (Part –II)
(I) All External Development :
(a) Road (Rest), Culvert & Security Goomty and Gate.
(b) Sewerage & Drainage
(c) Boundary wall,Gate,security cabin,Police out post(Partly as shown in
drawing Rain water collection sump cum pump house.
(d) External Electrical (Rest)
(e) Rain Water Pit (One Nos.)
(f) Sand Filling (Boys Hostel, Girls Hostel and Academic block)
(g) External Tele-Communication (Rest)
(h) S.T.P. 150 K.L.D (2 Nos).
(i) Under Ground Reservoir
(j) Over Head Tank cum pump house.
(k) Water Supply
(l) Sand Filling (rest Building and areas development)
(m) Sports Ground & Landscaping
(n) External Tele-Communication
(o) Parking.
(p) V.A.T with pump house.
(q) Fire fighting U.G .Sump with pump house.
7. Liquidated damages : 0.5% of the accepted tender amount per
week subject to a ceiling of 5% of the
accepted tender amount.
8. Value of works for Interim certificate: Rs. 2 Crores subject to minimum of one bill
in one month.
9. Period of honoring Certificate : a) 15 (fifteen) days for R.A. Bills from the
date of receipt of certificate from the
Architect/PMC.
10. Total Security Deposit : 10% of the gross value of work done &
claimed in each bill provided the total
security deposit i.e. ISD+ retention money
shall both together not exceeding 5% of the
contract value or 5% of final bill whichever
is more.
11. Initial Security Deposit : 2% of the accepted tender amount including
EMD.
25
CONTRACTOR NLUO
INSTRUCTIONS TO THE TENDERERS.
1.0 Scope of work.
Sealed tenders are invited by “National Law University Campus at Naraj, Cuttack, ODISHA,
for the External development work of National Law University Orissa Campus Works at Naraj,
Cuttack ODISHA.
1.1 Site & location.
The proposed work is to be carried out at Naraj, Cuttack, ODISHA .
2.0 Tender Document.
2.1. The work has to be carried out strictly according to the conditions stipulated in the tender
consisting the following documents and the most workman like manner.
Instruction to tenderers.
General condition of contract.
Special Condition of Contract.
Technical Specifications.
Additional specification.
Drawings.
Price Bid.
2.2. The above documents shall be taken as complementary & mutually explanatory of one
another but in case of ambiguities or discrepancies , shall take precedence in the order
given below.
a) Price Bid.
b) Additional Specifications.
c) Technical Specifications.
d) Drawings.
e) Special Condition of Contract.
f) General Condition of Contract.
g) Instruction to Tenderers.
2.3. Complete set of tender document including drawings can be obtained in person from
the National Law University Campus at Naraj, Cuttack, ODISHA, for the External
development work of National Law University Campus Works at Naraj, Cuttack
ODISHA , between 10.00 to 17.00 hrs. on any day except holiday during the period
mentioned in the Notice Inviting Tender on payment of Rs 20,000.00 ( Rupees
twenty thousand) by means of cash / demand draft drawn in favour of “ The Registrar,
National Law University ORISSA” Naraj, Cuttack, ODISHA.
2.4. The tender documents are not transferable.
3.0 Site Visit.
The Tenderer must obtain himself on his own responsibility and his own expenses all the
information and data which may be required for the purpose of filling his tender document
and enter into a contract for the satisfactory performance of the work. The tenderer is
26
CONTRACTOR NLUO
requested satisfy himself regarding the availability of water, power, transport and
communication facilities, the character quality and the site quantity of materials, labour, the
law & order situation, climatic conditions local authorities requirement, traffic regulations
etc.
4.0 Scope of Demolition work
a. The contractor shall undertake demolition of the building under supervision of the
PMC/N.L.U.O‟s representatives without causing damage to neighboring structure, public
utilities, lives and properties of the neighbours, persons engaged in supervision and
demolition of work. The owner will not be held liable for any willful damage and loss
caused to lives and properties as mentioned above and the contractor shall remain liable
to indemnify on account of any loss and damages.
b. The contractor shall engage only skilled persons and supervisor who are conversant with
demolition procedure, practice and safety rules.
c. The contractor shall arrange for disposal of the demolished materials from site in an
organized and systematic manner without causing hindrance to N.L.U.O premises/
public and traffic.
d. Any precious material, item of antique nature found in the process of demolition shall be
returned to the owner, should in the opinion of the owner the material so retrieved are of
adequate significance and value.
e. The contractor shall pay the net salvage value to owner on account of demolition work in
the form of a bank draft / bank Guarantee issued from a nationalized bank during the
executive of the contract agreement.
f. The demolition shall include the removal of all structures upto bottom of foundation
including taking our foundation and refilling the same with consolidated earth and
leveling the site as directed by the consultant.
g. Articles of the following nature are considered to be the property of the NLUO and shall
not be within the scope of the contract and shall not be taken away by the contractor.
Tube well with hand pump
Electrical accessories with fans, lights etc.
Loose furniture made of timber or steel, work station, partitions etc.
Trees and plantations
h. All buildings and structures including service overground and underground related to the
building and structures inclusive of foundations within the area to be cleared except
those mentioned in the item no. (i) above shall be dismantled and removed away from
the site. Simultaneously with dismantling, all debris are to be removed from the site in,
conformity with the local bye laws and municipality regulation.
i. Any services running through the site but serving other areas / sites shall be diverted by
the NLUO prior to handling over the site or on receipt of intimation from the contractor
during dismantling of existing structure. The diverted services should in no way be
disturbed. If any disruptions of the services occur due to activities of the contractor, it
will have to be restored by the contractor forthwith at their own cost.
27
CONTRACTOR NLUO
j. a: The contractor shall not be allowed to use any area outside the area to be
cleared for stacking of materials or any other purpose, whatsoever.
b: Salvaged materials shall not be stored on the site except upon the specific
approval of the PMC.
The work of dismantling and removal of dismantled materials must be done in such a
way so as to cause no damage to any neighbouring structures, properties or disturbance
to public. The contractor must take all precautions, necessary for the safety of public and
properties around the area and against injury to or loss of life to his workmen. Any such
damage or loss shall be the Contractor‟s liability.
k. STANDARD SPECIFICATIONS:
i. The demolition work should be carried out as per I.S. Code of Practice No.
4130:1967 (Safety Code of Demolition of Buildings).
ii. The contractor shall provide all necessary plants and materials, labour,
transport etc. required for complete the proposed demolition and removal of
the materials.
iii. The contractor shall obtain necessary permission from the Municipality
and/or any other authority that may be required for demolition of the
structures etc. Necessary fees if required shall be paid by the Contractor and
no separate payment on this account will be made to him.
iv. The contractor shall provide in suitable places substandard barriers in
boardings and such additional safeguards that may be required to protect the
public from injury or damage of any kind due to the work under this contract
and shall maintain such protection until the completion of this work. He shall
arrange to pay all Municipal fees and other legal charges that may have to be
paid and keep the NLUO free from any liability in this respect.
v. No encroachment of roads will be allowed for storing dismantled materials to
avoid inconvenience of operation of the N.L.U.O activity, vehicular traffic
and pedestrians.
vi. Shelter or stay for the labourers has to be arranged by the Contractor.
The tenderer will be fully responsible for considering the financial effect of any or all the factors
while submitting the tender.
28
CONTRACTOR NLUO
5.0. Earnest Money.
5.1. The tenderers are requested to submit the earnest money of Rs 45,00,000.00 (Rupees
Forty five lakhs Only) in the form of Demand draft.
5.2. EMD in any other form other than as specified above will not be accepted. Tender not
accompanied by the EMD is liable to be rejected.
5.3. No interest will be paid on the EMD.
5.4. EMD of unsuccessful tenderers will be refunded with in 30 days of award of contract.
5.5. EMD of successful tenderer will be retained as a part of security deposit.
6.0. Initial Security Deposit.
The successful tenderer will have to submit a sum of equivalent 2% of the contract value
less EMD by means of D/D drawn in favour of “ The Registrar, National Law
University ORISSA within a period of 15 days of the acceptance of tender.
7.0. Security Deposit.
7.1. Total security deposit shall be 5% of the contract value. Out of this 2% of contract value
is in the form of initial security deposit which includes the EMD. Balance 3% shall be
deducted from the running account bill of the work at the rate of 10% of the respective
running account bill i.e. deduction from each running bill account will be 10% till total
5% of contract value is reached. 50% of the total security shall be paid to the contractor
on the basis of PMC certifying the virtual completion. The Balance 50% would be paid
to the contractor after the defect liability period as specified in the contract.
7.2. No interest shall be paid to the amount retained by the N.L.U.O as Security
Deposit.
8.0. Signing of the Contract Document.
The Successful tenderer shall be bound to implement the contract by signing an
agreement and condition of contract attached herewith within 30 days from the receipt of
intimation of acceptance of his tender by the N.L.U.O. However, the written acceptance
of the tender by the N.L.U.O will constitute a binding agreement between the N.L.U.O
and successful tenderer whether such formal agreement is subsequently entered into or
not.
9.0 Validity of Tender.
Tender shall remain valid and open for acceptance for a period of six (6) months from
the date of opening of price bid. If the tenderer withdraws his/her offer during the
validity period or makes modifications in his/her original offer which are not acceptable
to the N.L.U.O without prejudice to any other right or remedy the N.L.U.O shall be at
liberty to forfeit the EMD.
29
CONTRACTOR NLUO
10.0. Liquidated Damage.
The liquidated damages shall be 0.5% per week subject to a maximum of 5% of contract
value.
11.0 INTERIM PENALTY
11.1 The time allowed for carrying out the work as entered in the tender shall be strictly
observed by the Contractor and shall be deemed to be of the essence of the contract on
the part of the contractor and shall be reckoned from the 10th day after the date on which
the order to commence the work is issued to the Contractor.
11.2 The work shall through out the stipulated period of the contract be proceeded with all
due diligence. Before commencing the work, the Contractor shall submit a detailed
programme of work prepared in accordance with the aforesaid time schedule (Bar
Chart), to the PMC, Project Director for approval. Upon NLUO‟s acceptance of the
same, the Contractor shall proceed with the work with all the diligence and regularity.
the work programme shall be verified on the first working day of each month by the
Project Director, and in case it is not adhered to in any item of work stated therein, or the
agreed programme remains uncommented, incomplete, or delayed, the Contactor shall be
liable to pay compensation for interim delay, an amount of. Rs. 15,000 per day of default
during the first 3 months and there after the penalty will be Rs 10,000 per day. The
interim penalty is refunded on making good the delay.
12.3 This amount shall be recovered from each interim bill of the Contractor, the deductions
thus made being refunded only upon the Contractor making good the delay to bring the
work in agreement with the detailed programme of work. However, if in the opinion of
the NLUO, the delay (in any particular item of work in the whole) is of a minor nature
only, and occurring due to reason beyond control, the amount so being withheld may be
waived by NLUO at his sole discretion. Provided always that the entire amount withheld
shall stand forfeited if the entire project is not completed by the due date or extended
date of completion.
12.0. Rate and Prices.
12.1. This is item rate tender.
12.1.1. The tenderers shall quote their rates for individual items both in words and figures in
case of discrepancy between the rate quoted in words and figures the unit rate quoted in
words will prevail. If no rate is quoted for a particular item the contractor shall not be
paid for that item when it is executed.
The amount of each item shall be calculated and the requisite total is given. In case of
discrepancy between the unit rate & the total amount calculated from multiplication of
unit rate and the quantity the unit rate quoted will govern and the amount will be
corrected.
12.1.2. The tenderers need not quote their rates for which no quantities have been given. In case
the tenderers quote their rates for such items those rates will be ignored and will not be
considered during execution.
30
CONTRACTOR NLUO
12.1.3. The tenderers should not change the units as specified in the tender. If any unit is
changed the tenders would be evaluated as per the original unit & the contractor would
be paid accordingly.
The tenderer should not change or modify or delete the description of the item. If any
discrepancy is observed he should immediately bring to the knowledge of the Architect/
N.L.U.O.
12.1.4. Each page of the BOQ shall be signed by the authorized person and cutting or
overwriting shall be duly attested by him.
12.1.5. Each page shall be totaled and the grand total shall be given.
12.1.6. The rate quoted shall be firm and shall include all costs, allowances, taxes, levie
SUBMISSION OF DOCUMENTS BEFORE COMMENCE MENT OF WORK
Before commencement of work the contractor shall submit the following documents-
(a) Performance Bank Guarentee
(b) Copy of the valid labour liscence.
(c) Copy of labour cess registration under building & other construction workers welfare
Cess Act,1996.
(d) Copy of the ST/WCT/TOT/VAT Registration number along with the copy of document.
(e) Copy of EPF Code no./Regd no.
(f) Contractors all risk policy/Erection all Risk Policy
(g) Insurance under Workmen Compensation Act
(h) Copy of Service Tax Registration No.
(i) Copy of ESIC registration as applicable
The release of first Payment(Running Bill or any other Advance Except Mobilisation
Advance ) shall be subject to submission of above mentioned Documents
31
CONTRACTOR NLUO
GENERAL CONDITIONS OF CONTRACT.
1.0. Definitions:
“Contract means the documents forming the tender and the acceptance thereof and the formal
agreement executed between National Law University ORISSA (client) and the contractor,
together with the documents referred therein including these conditions , the specifications,
designs, drawings & instructions issued from time to time by the Architect/ N.L.U.O and all
these documents taken together shall be deemed to form one contract and shall be
complementary to one another.
1.1. In the contract the following expression shall, unless the context otherwise
requires, have the meaning hereby respectively assigned to them.
1.1.1 “N.L.U.O” shall mean National Law University ORISSA (client) having it‟s office at
Chahata, Tulasipur, Cuttack - 753008, ODISHA. & includes the client‟s representatives,
successors & assigns.
1.1.1(a). “Architect/ Consultant” shall mean “M/s. RATH ARCHITECTONIC”, Plot
No. 104, Madhuaudan Nagar, Unit-IV, Bhubaneswar-751001.
1.1.1(b). “PMC” shall mean “M/s. RATH ARCHITECTONIC”, Plot No. 104, Madhusudan
Nagar, Unit-IV, Bhubaneswar-751001.
1.1.2. “PROJECT DIRECTOR” shall mean an Engineer appointed by the N.L.U.O as their
representative to give instructions to the contractor.
1.1.3. “The Contractor” shall mean the individual or firm or company whether incorporated or
not, undertaking the works and shall include legal representative of such individual.
1.1.4. „Engineer‟ shall mean the representative of the Architect/consultant.
1.1.5. „Drawings‟ shall mean the drawings prepared by the Architects and then issued by the
Engineer and referred to in the specifications and any modifications of such drawings as
may be issued by the Engineer from time to time „Contract value shall mean the value of
the entire work as stipulated in the letter of acceptance of tender subject to such additions
thereto or deductions there from as may be made under the provision herein after
contained.
1.1.6. „Specifications‟ shall mean the specifications referred to in the tender and any
modifications thereof as may time to time be furnished or approved by the architect
consultant “Month” means calendar month.
1.1.7. “Week” means seven consecutive days.
1.1.8. “Day” means a calendar day beginning and ending at 00Hrs and 24 Hrs respectively.
DEFECT LIABILITY PERIOD
1.1.9. The Defect Liability Period shall commence from the date of virtual completion as
mentioned in the Certificate of Virtual Completion issued by NLUO. The duration of the
Defect Liability Period shall be one years after the date of issue of virtual completion
certificate by NLUO to the Contractor. i.e. (one year after all the works as per the scope
of work including completion of all buildings, external development works are
complete.
32
CONTRACTOR NLUO
CLAUSE
1.0. Total Security Deposit
Total Security deposit comprises of
Earnest money deposit
Initial Security deposit
Retention Money.
a) Earnest money Deposit
The tenderer shall furnish EMD of Rs. 45,00,000.00 (Rupees Forty five lakhs only) in
the form of Demand Draft drawn in favour of “ The Registrar, National Law University
ORISSA. No tenders shall be considered unless the EMD is so deposited in the required
form. No interest shall be paid on this EMD. The EMD of the unsuccessful tenderer shall
be refunded soon after the decision to award the contract is taken without interest. The
EMD shall stand absolutely forfeited if the tenderer revokes his tender at any time the
period when he is required to keep his tender open acceptance by the NLUO or after it is
accepted by the NLUO the contractor fails to enter into a formal agreement or fails to
pay the initial security deposit as stipulated or fails to commence the commence the
work within the stipulated time.
b) Initial Security Deposit (ISD)
The amount of ISD shall be 2% of accepted value of tender including the EMD in the
form of D/D drawn on any scheduled Bank and shall be deposited within 15 (fifteen)
days from the date of acceptance of tender.
c) Retention Money
Besides the ISD as deposited by the contractor in the above said manner the retention
money shall be deducted from the running account bill at the rate of 10% of the gross
value of work done by the contractor and claimed in each bill provided the total security
deposit i.e. The ISD plus Retention Money shall both together not exceed 5% of the
contract value ,50% of the total security deposit shall be refunded to the contractor with
out any interest on issue of Virtual Completion certificate by the Architect/consultant.
The balance 50% of the total security deposit shall be refunded to the contractors without
interest within fifteen days after the end of defects liability period provided the
contractor has satisfactorily attended to all defects in accordance with the conditions of
contract including site clearance.
2.0 Language
The language in which the contract documents shall be drawn shall be in English.
3.0 Errors, omissions and discrepancies
In case of errors, omissions and/ or disagreements between written and scaled
dimensions on the drawings or between the drawings and specifications etc., apply in the
following order.
i) Between scaled and written dimension (or description) on a drawing, the latter shall be
adopted.
33
CONTRACTOR NLUO
ii) Between the written or shown description or dimensions in the drawings and the
corresponding one in the specification the former shall be taken as correct.
iii) Between written description of the item in the specifications and descriptions in bills of
quantities of the same item, the former shall be adopted.
a) In case of difference between rates written in figures and words, the rate in words shall
prevail.
b) between the duplicate / subsequent copies of the tender, the original tender shall be taken
as correct.
4.0 Scope of work
The contractor shall carryout complete and maintain the said work in every respect in
strict accordance with this contract and with the decision to the satisfaction of the
N.L.U.O to be communicated through the PMC/ Consultant at the directions of the
N.L.U.O from time to time issue further drawings and / or written instructions, details
directions and explanations which are hereafter collectively referred to as Architect‟s /
consultant‟s instructions in regard to the variation or modification of the design, quality
or quantity of work or the addition or omission or substitution of any work. Any
discrepancy in the drawings or between the BOQ and / or drawings and / or
specifications. The removal from the site of any material brought thereon buy the
contractor and any substitution of any other materials therefore the removal and / or re-
execution of any work executed by him. The dismissal from the work of any person
employed / engaged there upon.
5.0 i) Letter of Acceptance
Within the validity period of the tender the N.L.U.O shall issue a letter of acceptance
either directly or through the architect by registered post or otherwise depositing at the
address of the contractor as given in the tender to enter into a Contract for the execution
of the work as per the terms of the tender. The letter of acceptance shall constitute a
binding contract between the NLUO and the contractor.
ii) Contract Agreement
On receipt of intimation of the acceptance of tender from the NLUO/ PMC the
successful tenderer shall be bound to implement the contract and within fifteen days
thereof he shall sign an agreement in non judicial stamp paper of appropriate value.
6.0 Ownership of drawings
All drawings, specifications and copies thereof furnished by the NLUO through its
architects / consultants are the properties of the NATIONAL LAW UNIVERSITY,
ODISHA. They are not to be used for any work.
7.0 Detailed drawings and instructions
The NLUO through its architects/ consultants shall furnish with reasonable promptness
additional instructions by means of drawings or otherwise for the proper execution of the
work. All such drawings and instructions shall be consistent with the contract
documents, true developments thereof and reasonably inferable there from. The work
shall be executed in conformity therewith and the contractor prepare a detailed
programme schedule indicating therein the date of start and completion of various
activities on receipt of the work order and submit the same to the NLUO through the
architect/ consultant /PMC.
34
CONTRACTOR NLUO
7.1 Copies of agreement
Two copies of agreement duly signed by both the parties with the drawings shall be
handed over the contractors.
8.0 Liquidated damages:
If the contractor fails to maintain the progress required to complete the work and clear
the site including vacating their office on or before the contracted or extended date or
completion without justification in support of the cause of delay or
a. Delay in completion.
b. The defect which suppose to be rectified as per the advice of National Law
University ORISSA / Project Management Consultant within the stipulated period.
c. Non specified material.
d. Payment of labour & statutory uses. and he may be called upon without prejudice to any
other right of remedy available under the law to the NLUO on account of such breach
to pay a liquidated damages at the rate of 0.5% of the contract value which subject to a
maximum of 5% of the contract value.
9.0 Materials, Appliances and Employees
Unless or otherwise specified the contractor shall provide and pay for all materials,
labour, water, power, tools, equipment transportation safety measure and any other
facilities that are required for the satisfactory execution ad completion of the work.
Unless otherwise specified all materials shall be new and both workmanship and
materials shall be best quality. The Contractor shall at all times enforce strict discipline
and good order among his employees and shall not employ on the work any unfit person
of anyone not skilled in the work assigned to him. Workman whose work or behavior is
found to be unsatisfactory by the NLUO/Architect/ PMC he shall be removed from the
site immediately.
10.0. Permits, Laws & Regulations:
Permits & Licenses required for the execution of the work shall be obtained by the
contractor at his own expense. The contractor shall give notices & comply with the
regulations, laws, ordinances rules, applicable to the contract. If the contractor observes
any discrepancy between the drawings and specifications, he shall promptly notify the
NLUO in writing under intimation of the Architect/ Consultant. If the contractor
performs any act, which is against the law , rules & regulations he shall meet all the costs
arising there from and shall indemnify the NLUO any legal action arising there from.
Labour licenses and they should have P.F No. of their employee which will submitted to
NLUO.
11.0 Setting Out Work:
The contractor shall set out the work and shall be responsible for the true and perfect
setting out of the same and for the correctness of the positions, levels, dimensions and
alignment of all parts thereof and get it approved by the Architect/ Consultant before
proceeding with the work. If at any time any error in this respect shall appear during the
progress of the works, irrespective of the fact that the layout had been approved by the
Architect/ Consultant the contractor shall be responsible for the same and shall at his
own expenses rectify such error, if so, required to satisfaction of the NATIONAL LAW
UNIVERSITY, ORISSA.
35
CONTRACTOR NLUO
12.0. Protection of works and Property:
The contractor shall continuously maintain adequate protection. Of all his work from
damage and shall protect the NATIONAL LAW UNIVERSITY, ORISSA‟s properties
from injury or loss arising in connection with contract. He shall make good any such
damage, injury, loss, except due to causes beyond his control and due to his fault or
negligence.
He shall take adequate care and steps for protection of the adjacent properties. The
contractor shall take all precautions for safety and protections of his employees on the
works and shall comply with all applicable provisions of government & local bodies
safety laws & building codes to prevent accidents, or injuries to persons or property on ,
about or adjacent to this place of work. The contractor shall take insurance covers as per
clause 24.0 at his own cost. The policy may taken in joint names of contractor and the
NLUO and the original policy may be lodged with the NATIONAL LAW
UNIVERSITY, ORISSA.
13.0 Inspection of work:
The NATIONAL LAW UNIVERSITY, ORISSA/ Architect/ Consultant or their
representatives shall at all reasonable times have free access to the work site and/or to
the workshop, factories or other places where materials are lying or from where they
are obtained and the contractor shall give every facility to the NATIONAL LAW
UNIVERSITY, ORISSA, Architect/Consultant and their representatives necessary for
inspection & examination and test of the materials an workmanship. No person unless
authorized by the NATIONAL LAW UNIVERSITY, ORISSA/Architect/Consultant
except the representative of Public authorities shall be allowed on the work at any
time. The proposed work either during it‟s construction stage or it‟s completion can also
be inspected by the Chief Technical Examiner‟s Organization a wing of Central
Vigilance Commission.
14.0. Assignment & Subletting
The whole of work included in the contract shall be executed by the contractor and he
shall not directly entrust and engage or indirectly transfer, assign or underlet the contract
any part or share thereof or interest therein without the written consent of the NLUO
through the Architect and no undertaking shall relieve the Contractor from the
responsibility of the contractor from active superintendence of the work during it‟s
progress.
15.0. Quality of Material, Workmanship & Test
All materials and workmanship shall be the best of respective kinds described in the
contract and in accordance with Architect/Consultant. The Architect /Consultant
instructions and shall be subject from time to time to such tests as the Architect/
Consultant may direct at the places of manufacture or fabrication or on the site or an
approved testing laboratory. The contractor shall provide such assistance, instruments,
machinery, labour and materials as are normally required for examining measuring
sampling and testing any material or part of work before incorporation in the work for
testing as may be selected and required by the Architect/ Consultant.
36
CONTRACTOR NLUO
ii) Samples
All samples of adequate numbers, size, shades & pattern as per specifications shall be
supplied by the contractor without any extra charges. If certain items proposed to be used
are of such nature that samples cannot be presented or prepared at the site detailed
literature/ test certificate of the same shall be provided to the satisfaction of the PMC/
Consultant. Before submitting their sample / literature the contractor shall satisfy himself
that the material / equipment for which he is submitting the sample/ literature meet with
the requirement of tender specification. Only when the samples are approved in writing
by the architect/ consultant the contractor shall proceed with the procurement and
installation of the particular material / equipment. The approved samples shall be signed
by the PMC/ Consultant for inspection / comparison at any time. The PMC/ Consultant
shall take reasonable time to approve the samples for reasons of its not meeting the
specifications or other discrepancies inadequacy in furnishing samples of best qualities
from various manufacturers and such other aspects causing delay on the approval of the
materials / equipment etc. shall be to the account of the contractor.
iii) Cost of tests
The cost of making any test shall be borne entirely by the contractor if such tests is
required be done or any provided specification or in BOQ.
iv) Cost of tests not provided for
If any test is ordered by the PMC/ Consultant which is either
a) If so intended by or provided for or ( in the cases above mentioned) is not so
particularized , or though so intended or provided for but ordered by the Architect /
PMC to be carried out by; an independent person at any place other than the site or
the place of manufacture or fabrication of the materials tested or any Government /
approved laboratory, then the cost of such test shall be borne by the contractor.
16.0 Obtaining information related to execution of work
No claim by the contractor for additional payment shall be entertained which is
consequent upon failure on his part to obtain correct information as to any matter
affecting the execution of the work not any or the obtaining incorrect information or the
failure to obtain correct information relieve him from any risks or from the entire
responsibility for the fulfillment of contract.
17.0 Contractor‟s superintendence
The contractor shall give necessary personal superintendence during the execution of the
works and as long, thereafter, as the PMC/ Consultant may consider necessary until the
expiry of the defects liability period, stated hereto.
18.0 Quantities
The bill of quantities (BOQ) unless or otherwise stated shall be deemed to have been
prepared in accordance with the Indian Standard Method of Measurements and
quantities. The rate quoted shall remain valid for variation of quantity against
individual item to any extent subject to maximum variation of the contract value by
37
CONTRACTOR NLUO
25%. All the amount paid under clause 19,20 hereof as well as amounts of prime cost
and provisional sums, if any, shall be excluded.
ii) Variation exceeding 25%
The items of works executed in relation to variation exceeding 25% shall be paid on the
basis of provisions of clause 21 (e) hereof.
19.0 Works to be measured
The PMC/ Consultant may from time to time intimate to; the contractor that he required
the work to be measured and the contractor shall forthwith attend or send a qualified
representative to assist the Architect in taking such measurements and calculation and to
furnish all particulars or to give all assistance required by any of them. Such
measurements shall be taken in accordance with the Mode of measurements detailed in
the specifications. The representative of the Architect/ Consultant shall take joint
measurements with the contractor‟s representative and the measurements shall be
entered in the measurement book. The contractor or his authorized shall sign all the
pages of the measurement book in which the measurements have been recorded in token
of his acceptance. All the corrections shall be duly attested by both representatives. No
over writings shall be made I the M book should the contractor not attend or neglect or
omit to depute his representative to take measurements them the measurements recorded
by the representative of the PMC/ Consultant shall be final. All authorized extra work;
omissions and all variations made shall be included final. All authorized extra work;
omissions and all variations made shall be included in such measurement.
20.0 Variations
No alteration, omission or variation ordered in writing by the PMC/ Consultant shall
vitiate the contract. In case the NLUO/ PMC thinks proper at any time during the
progress of works to make any alteration in, or additions to or omissions from the works
or any alteration in the kind or quality of the materials to be used therein, the PMC/
NLUO shall give notice thereof in writing to the contractor or shall confirm in writing
within seven days of giving such oral instructions the contractor shall alter to, add to, or
omit from as the case may be in accordance with such notice, but the contractor shall not
do any work extra to or make any alterations or additions to or omissions from the works
or any deviation from any of the provisions of the contract, stipulations, specifications or
contract drawing without previous consent in writing of the PMC/ NLUO and the value
of such extras, alterations, additions or omissions shall in all cases be determined by the
PMC/ NLUO and the same shall be added to or deducted from the contract value, as the
case may be.
21.0 Valuation of Variations
No claim for an extra shall be allowed unless it shall have been executed under the
authority of the PMC/ Consultant with the concurrence of the NLUO as herein
mentioned. Any such extra is herein referred to as authorized extra and shall be made in
accordance with the following provisions.
a) (i) The net rates or prices in the contract shall determine the valuation of the extra
work where such extra work is of similar character and executed under similar
conditions as the work priced herein.
38
CONTRACTOR NLUO
(ii) Rates for all items, wherever possible should be derived out of the rates given in
the priced BOQ.
b) The net prices of the original tender shall determine the value of the items omitted,
provided if omissions do not vary the conditions under which any remaining items of
works are carried out, otherwise the prices for the same shall be valued under sub-clause
(C) hereunder.
c) Where the extra works are not of similar character and / or executed under similar
conditions as aforesaid or where the omissions vary the conditions under which any
remaining items of works are carried out, then the contractor shall within 7 days of the
receipt of the letter of acceptance inform the PMC/ Consultant of the rate which he
intends to charge for such items of work, duly supported by analysis of the rate of rates
claimed and the Architect/ consultant shall fix such rate or prices as in the
circumstances in his opinion are reasonable and proper, based on the market rate.
d) Where extra work cannot be properly measured or valued the contractor shall be
allowed day work prices at the net rates stated in the tender of the BOQ or, if not, so
stated then in accordance with the local day work rates and wages for the district
provided that in either case, vouchers specifying the daily time (and if required by the
PMC/ Consultant) the workman‟s name and materials employed be delivered for
verifications to the PMC/ Consultant at or before the end of the week following that in
which the work has been executed.
e) It if further clarified that for all such authorized extra items where rates cannot be
derived from the tender, (OPWD) the Contractor shall submit rates duly supported by
rate analysis worked on the “market rate basis” for material, labour, hire / running
charges of equipment and wastages etc. plus 12% towards establishment charges,
contractor‟s overheads and profit. Such items shall not be eligible for escalation.
22.0 Final Measurement
The measurement and valuation in respect of the contract shall be
completed within six months of the virtual completion of th e work.
23.0 Virtual completion certificate (VCC)
On successful completion of entire works covered by the contract to the full
satisfaction of the NATIONAL LAW UNIVERSITY, ORISSA, the
contractor shall ensure that the following works have been completed to the
satisfaction of the NLUO:
a) clear the site of all scaffolding, wiring, pipes, surplus materials,
contractor‟s labour, equipment and machinery.
b) Demolish, dismantle and remove the contractor‟s site office, temporary
works, structures including labour sheds/camps and constructions and other
items and things whatsoever brought upon or erected at the site or any land
allotted to the contractor by the NLUO and not incorporated in the
permanent works.
39
CONTRACTOR NLUO
c) Remove all rubbish, debris etc, from the site and the land allotted to the
contractor by the NLUO and shall clear, level and dress, compact the site as
required by the NATIONAL LAW UNIVERSITY, ORISSA.
d) Shall put the NLUO in undisputed custody and possession of the site and all
land allotted by the NATIONAL LAW UNIVERSITY, ORISSA.
e) Shall hand over the work in a peaceful manner to the NATIONAL LAW
UNIVERSITY, ORISSA.
f) All defects / imperfections have been attended and rectified as pointed out
by the NLUO to the full satisfaction of NATIONAL LAW UNIVERSITY,
ORISSA.
Upon the satisfactory fulfillment by the contractor as stated above, the
contractor shall be entitled to apply to the PMC is satisfied of the
completion of the work. Relative to which the completion certificate has
been sought, the PMC shall within fourteen (14) days of the receipt of the
application for virtual completion certificate, issue a VCC in respect of the
work for which the VCC has been applied.
This issuance of VCC shall be without prejudice to the NATIONAL LAW
UNIVERSITY, ORISSA‟s rights and contractor‟s liabilities under the
contract including the contractor‟s liability for defects liability period nor
shall the issuance of VCC in respect of the works or work at any site be
construed as a waiver of any right or claim of the NLUO against the
contractor in respect of works or works at the site and in respect of which
the VCC has been issued.
23.1 Work by other agencies
The NLUO/ PMC/ Consultant reserves the rights to use premises and any
portion of the site for execution of any work not included in the scope of
this contract which it may desire to have carried out by other persons
simultaneously and the contractor shall not only allow but also extend
reasonable facilities for the execution of such work. The contractor
however shall not be required to provided any plant or material for the
execution of such work except by special arrangement with the NATIONAL
LAW UNIVERSITY, ORISSA. Such work shall be carried out in such
manner as not to impede the progress of the works included in th e contract.
24.0 Insurance of works
24.1 Without limiting his obligations and responsibilities under the contract the
contractor shall insure the insurance is being covered in the joint names of
the NLUO and the contractor against all loss of damages fro m whatever
cause arising other than the excepted risks, for which he is responsible
under the terms of contract and in such a manner that the NLUO and
contractor are covered for the period stipulated and are also covered during
the period of maintenance for loss or damage arising fro a clause, occurring
prior to the commencement of the period of maintenance and for any loss or
40
CONTRACTOR NLUO
damage occasioned by the contractor in the course of any operations carried
out by him for the purpose of complying with his obli gations under clause.
a) The works for the time being executed to the estimated current Contract
value thereof, or such additional sum as may be specified together with the
materials for incorporation in the works at their replacement value.
b) The constructional plant and other things brought on to the site by the
contractor to the replacement value of such constructional plant and other
things.
c) Such insurance shall be effected with an insurer and in terms approved by
the NLUO which approval shall not be unreasonably withheld and the
contractor shall whenever required produce to the PMC/ Consultant the
police if insurance and the receipts for payment of the current premiums.
24.2 Damage to persons and property
The contractor shall, except if and so far as the contract provides otherwise
indemnify the NLUO against all losses and claims in respect of injuries or
damages to any person or material or physical damage to any property
whatsoever which may arise out of or in consequence of the execution and
maintenance of the works and against all claims proceedings, damages,
costs, charges and expenses whatsoever in respect of or in relation thereto
except any compensation of damages for or with respect to :
a) The permanent use or occupation of land by or any p art thereof.
b) The right of NLUO to execute the works or any part thereof on, over,
under, in or through any lands.
c) Injuries or damages to persons or properties which are unavoidable result of
the execution or maintenance of the works in accordance wit h the contract.
d) Injuries or damage to persons or property resulting from any act or neglect
of the NLUO their agents, employees or other contractors not being
employed by the contractor or for or in respect of any clams, proceedings,
damages, costs, charges and expenses in respect thereof or in relation
thereto or where the injury or damage was contributed to by the contractor,
his servants or agents such part of the compensation as may be just and
equitable having regard to the extent of the responsibi lity of the
NATIONAL LAW UNIVERSITY,ORISSA, employees, or agents or other
contractors for the damage of injury.
24.3 Contractor to indemnify NLUO
The contractor shall indemnify the NLUO against all claims, proceedings,
damages cost, charges and expenses i n respect of the matters referred to the
provision sub-clause 24.2 of this clause.
41
CONTRACTOR NLUO
24.4 Contractor‟s superintendence
The contractor shall fully indemnify and keep indemnified the NLUO
against any action, claim or proceeding relating to infringement or u se of
any patent or design or any alleged patent or design rights and shall pay any
royalties which may be payable in respect of any article or part thereof
included in the contract. In the event of any claim made under of action
brought against NLUO in respect of such matters as aforesaid the contractor
shall be immediately notified thereof and the contractor shall be at liberty,
at his own expenses to settle any dispute or to conduct any litigation that
may arise there from, provided that the contractor s hall not be liable to
indemnify the NLUO if the infringement of the patent or design or any
alleged patent or design right is the direct result of an order passed by the
PMC/ Architect in this behalf.
24.5 Third Party Insurance
24.5.1 Before commencing the execution of the work the contractor but without
limiting his obligations and responsibilities under clauses 24.0 of GCC
shall insure against his liability for any material or physical damage, loss,
or injury which may occur to any property including tha t of NATIONAL
LAW UNIVERSITY, ORISSA, or to any person, including any employee of
the NATIONAL LAW UNIVERSITY, ORISSA, by or arising out of the
execution of the works or in the carrying out of the contract, otherwise than
due to the mattes referred to in t he provision to clause 24.0 thereof.
24.5.2 Minimum amount of Third Party Insurance
Such insurance shall be effected with an insurer and in terms approved by
the NLUO which approval shall not be reasonably withheld and for at least
the amount stated below. The contractor shall, whenever required produce
to the PMC/ Consultant the policy or polices of insurance cover and
receipts for payment of the current premiums.
The minimum insurance cover for physical property, injury, and death
is Rs.5.00 lakhs per occurrence with the number of occurrences limited
to four. After each occurrence contractor will pay additional premium
necessary to make insurance valid for four occurrences always.
25.6 Accident or Injury to workman:
25.6.1 The NLUO shall not be liable for in respect of any damages or
compensation payable at law respect or in consequence of any accident or
injury or any workmen or other person in the employment of the contractor
or any sub-contractor, save and except an accident or injury resulting from
any act or default of the NLUO against all such damages and compensation,
save and expect as aforesaid, and against all such damages and
compensation, save and except as aforesaid, and against all claims,
proceedings, costs, charges and expenses whatsoever in respect thereof in
relation thereto.
42
CONTRACTOR NLUO
25.6.2. Insurance against accidents etc. to workmen
The contractor shall insure against such liability with an insurer approved
by the NLUO during the whole of the time that any persons are employed
by him on the work and shall, when required, produce to the PMC/
Consultant such police of insurance and receipt for payment of the current
premium. Provided always that, in respect of any persons employed by any
sub-contractor the contractor‟s obligation to insure as aforesaid under this
sub-clause shall be satisfied if the sub contractor shall have insured against
the liability in respect of such be persons in such manner that NLUO is
indemnified under the policy but the contractor shall require
such require sub-contractor to produce to the PMC/ Consultant when such
policy of insurance and the receipt for the payment of the current premium.
25.6.3 Remedy on contractor‟s failure to insure:
If the contractor fails to effect and keep in force the insurance referred to
above or any other insurance which he may be required to effect under the
terms of contract, then and in any such case the NLUO may effect and keep
in force any such insurance and pay such premium or premiums as may be
necessary for that purpose and from t ime to time deduct the amount so paid
by the NLUO as aforesaid from any amount due or which may become due
to the contractor, or recover the same as debt from the contractor.
25.6.4 Without prejudice to the others rights of the NLUO against contractors. In
respect of such default, the NLUO shall be entitled to deduced from any
sums payable to the contractor the amount of any damages costs, charges
and other expenses paid by the NLUO and which are payable by the
contractors under this clause. The contractor shall upon settlement by the
Insurer of any claim made against the insurer pursuant to a policy taken
under this clause, proceed with due diligence to rebuild or repair the works
destroyed or damaged, In this event all the monies received from the
Insurer in respect of such damage shall be paid to the contractor and the
Contractor shall not be entitled to any further payment in respect of the
expenditure incurred for rebuilding or repairing of the materials or goods
destroyed or damaged.
26.0 Commencement of Works:
The date of commencement of the work will be reckoned as the date of
handing over site by joint signature of contractor, PMC & NLUO or fifteen
days from the date of issue of letter of acceptance of the tender by the
NLUO whichever is later.
27.0 Time for completion
Time is essence of the contract and shall be strictly observed by the
contractor. The entire work shall be complete within a period of 24
calendar months from the date of commencement. If required in the contract
or as directed by the Architect/ consultant. The contractor shall complete
certain portions of work before completion of the entire work. However the
43
CONTRACTOR NLUO
completion date shall be reckoned as the date by which the whole work is
completed as per the terms of the contract.
28.0 Extension of time
If, in the opinion of the Architect /consultant, the work be delayed for
reasons beyond the control of the contractor, the PMC/ Consultant may
submit a recommendation to the NLUO to grant a fair and reasonable
extension of time for completion of work as per the terms of contract. If the
contractor needs an extension of time for the completion of work or if
completion of work is likely to be delayed for any reasons beyond the due
date of completion as stipulated in the contract, the contracto r shall apply
to the NLUO through the Architect /consultant in writing at least 30 Days
before the expiry of the scheduled time and while applying for extension of
time he shall furnish the reasons in detail and his justification if any, for
the delays The PMC/ Architect shall submit their recommendations to the
NLUO in the prescribed format for granting extension of time. While
granting extension of time the contractor shall be informed the period
extended time which will qualify for levy of liquidated dam ages. For the
balance period in excess of original stipulated period and duly sanctioned
extension of time by the NLUO the provision of liquidated damages as
stated under clause 8 shall become applicable. Further the contract shall
remain in force even for the period beyond the date of completion
irrespective whether the extension is granted or not.
29.0 Rate of progress
The entire of the material, plant and labour t o be provided by the
contractor. The mode, manner and speed of execution and maintenance of
the works are to be of a kind and conducted in a manner to the satisfaction
of the PMC should the rate of a progress of the work or any part thereof be
at any time be in the opinion of the Architect too slow to ensure the
completion of the whole of the work by the prescribed time or extended
time for completion the PMC shall thereupon take such steps as considered
necessary by the PMC, to expedite progress so as to complete the works by
the prescribed time or extended time. Such communications from the PMC
neither shall relieve the contractor from fulfilling obligations under the
contract not he will be entitle to raise any claims arising out of such
directions.
30.0 Work during nights and holidays
Subject to any provision to the contrary contained in the contract no
permanent work shall save as herein provided be carried on during the night
or on holidays without the permission in writing of the PMC/ Consultant,
save when the work is unavoidable or absolutely necessary for the saving
of a life or property or for the safety of the work in which case the
contractor shall immediately advise the PMC/ Consultant. However the
provisions of the clause shall not be applicable in the case of any work
which becomes essential to carry by rotary or double shifts in order to
achieve the progress and quality of the works being technically required /
44
CONTRACTOR NLUO
continued with the prior approval of the PMC/ Consultant at no extra cost
to the NATIONAL LAW UNIVERSITY, ORISSA.
All work at night after obtaining approval from competent authorities shall
be carried out without unreasonable noise an disturbance.
31.0 No compensation or restrictions of work
If at any time after acceptance of the tender NLUO shall decide to abandon
or reduce the scope of work for any reason whatsoever and hence not
required the whole or any part of the work to be carried out. The
Architect/PMC/ shall give notice in writing to that effect to the contractor
and the contractor shall act accordingly. In the matter. T he contractor shall
have no claim to any payment of compensation or otherwise whatsoever, on
account of any profit or advantage which he might have derived from the
execution of the work fully but which he did not derive in consequence of
the foreclosure of the whole or part of the work.
Provided that the contractor shall be paid the charges on the cartage only of
materials actually and confide brought to the site of the work by the
contractor and rendered surplus as a result of the abandonment, curtailme nt
of the work or any portion thereof and then taken back by the contractor,
provided however that the PMC/ Consultant shall have in such cases the
option of taking over all or any such materials at their purchase price or a
local current rate whichever is less.
“In case of such stores credit shall be given to him at the rates not
exceeding those at which were originally issued to the contractor after
taking into consideration and deduction for claims on account of any
deterioration or damage while in the custody of the contractor and in this
respect the decision of PMC/ Consultant shall be final.
32.0 Suspension of work
i) The contractor shall, on receipt of the order in writing of the PMC/
Consultant (whose decision shall be final and binding on the con tractor)
suspend the progress of works or any part thereof for such time and in such
manner as PMC/ Consultant may consider necessary so; as not to cause any
damage or injury to the work already done or endanger the safety thereof
for any of following reasons.
a) On account any default on the part of the contractor, or
b) For proper execution of the works or part thereof for reasons other than the
default of the contractor, or
c) for safety of the works or part thereof.
The contractor shall, during such suspension properly protect and secure
the works to the extent necessary and carry out the instructions given in
that behalf by the PMC/ Consultant.
45
CONTRACTOR NLUO
ii) If the suspension is ordered for reasons b) and c) in sub – Para I) above:
The contractor shall be entitles to an extension of time equal to the period
of every such suspension. No compensation whatsoever shall be paid on
this account.
33.0 Action when the whole security deposit is forfeited
In any case in which under any clause or clauses of this contract , the
Contractor by the PMC/ Consultant shall have the power to adopt any of the
following course as they may deem best suited to the interest of the
NATIONAL LAW UNIVERSITY, ORISSA.
a) To rescind the contract ( of which rescission notice in writing to the
contractor by the PMC/ Consultant shall be conclusive evidence) and in
which case the security deposit of the contractor shall be forfeited and be
absolutely at the disposal of NATIONAL LAW UNIVERSITY, ORISSA.
b) To employ labour paid by the NLUO and to supply materials to carry out
the work, or any part of the work, debiting the contractor with the cost of
the labour and materials ( the cost of such labour and materials as worked
out by the PMC/ Consultant shall be final and conclusive against the
contractor) and crediting him with the value of the work done, in all
respects in the same manner and at the same manner and at the same rates
as if it had been carried ;out by the contractor under the terms of this
contract the certificate of PMC/ Consultant as to the value of work done
shall be final and conclusive against the contractor.
c) To measure up the work of the contractor, and to take such part thereof as
shall be unexecuted, out of his hands, and to give it to another contractor to
complete in which case any expenses which may be incurred in excess of
the sum which would have been paid to the original contractor, if the whole
work had been executed by him (of the amount of which excess the
certificates in writing of the PMC/ Consultant shall be final and conclusive)
shall be borne by original contractor and may be deducted from any money
due to him by NLUO under the contract or otherwise, or from his security
deposit o the proceed of sale thereof, or sufficient part thereof.
In the event of any of above courses being adopted by the NLUO the
contractor shall have no claim to compensation for any loss sustained
by him by reasons of his having purchased or procured any material or
entered into any engagements or make any advances on account of, or with
a view to the execution of the work or the performance of the contract and
in case the contract shall be rescind under the provision aforesaid, the
contractor shall not be entitled to recover or to be paid any sum or any
work thereto for actually performed under this contract, unless, and until
the PMC/ Consultant will have certified in writing the performance of such
work and the value payable in respect thereof, and he shall only be entitled
to be paid the value so certified.
46
CONTRACTOR NLUO
34.0 NLUO has right to terminate the contract
If the contractor being an individual or a firm commit any „Act of
insolvency‟ or shall be adjusted an insolvent or being an incorporated
company shall have an order for compulsory winding up voluntarily or
subject to the supervision of G ovt. and of the Official Assignee of the
liquidator in such acts of insolvency of winding up shall be unable within
seven days after notice to him to do so, to show to the reasonable
satisfaction of the PMC/ Consultant that he is able to carry out and fulfill
the contract, and to give security therefore if so required by the PMC/
Consultant.
Or, if the contractor (whether an individual firm or incorporated company)
shall suffer execution to be issued or shall suffer any payment under this
contract to be attached by or on behalf of any of the creditors of the
contractor.
Or, shall assign or sublet this contract without the consent in writing of the
NLUO through the Architect/ consultant or shall charge or encumber this
contract or any payment due to which may become due to the contractor
there under :
(a) has abandoned the contract; Or
(b) has failed to commence the work, or has without any lawful excuse
under these conditions suspended the progress of the works for 14
(fourteen) days after receiving from the NLUO through the Architect/
Consultant written notice to proceed, or
(c) has failed to proceed with the works with such diligence and failed to
make such due progress as would enable the works to be completed within
the time agreed upon. Or has failed to remove materials from the site or to
pull down and replace work with in seven days after written notice from the
NLUO through Architect/ PMC that the said materials were condemned and
reject by the PMC under these conditions. Or has neglecte d or failed
persistently to observe and perform all or any of the acts, matters or things
by this contract to be observed and performed by the contractor for seven
days after written notice shall have been given to the contactor to observe
or perform the same or has to the detriment of good workmanship or in
defiance of the NLUO„s or Architect‟s
Consultant‟s instruction to the contrary subject any part of the contract.
Then and in any of said cases the NLUO and or the Architect/ consultant ,
may not withstanding any previous waiver, after giving seven days notice in
writing to the contractor determine the contract, but without thereby
affecting the powers of the NLUO or the Architect/ consultant or the
obligation and liabilities of the contractor the whol e of which shall
continue in force as fully as if the contract had not been so determined and
as if the works subsequently had been executed by or on behalf of the
contractor. And further the NLUO through the Architect/ Consultant their
agents or employees may enter upon and take possession of the work and all
plants, tools, scaffoldings, materials, sheds, machineries lying upon the
47
CONTRACTOR NLUO
premises or on the adjoining lands or roads use the same by means of their
own employees or workmen in carrying on and complet ing the work or by
engaging any other contractor or persons to complete the work and the
contractor shall not in any was interrupt or do any act, matter or thing to
prevent or hinder such other contractor or other persons employed for
completing and finishing or using the materials and plants for the work.
When the works shall be completed or as soon thereafter as convenient the
NLUO or the Architect/ consultant shall give a notice in writing to the
contractor to remove his surplus materials and plants and should the
contractor fail to do so within 14 days after receipt thereof by him the
NLUO sell the same by public auction after due publication, and shall
adjust the amount realized by such auction. The contractor shall have no
right to question any of the act of the NLUO incidental to the sale of the
materials etc.
35.0 Certificate of Payment
The contractor shall be entitled under the certificates to be issued by the
PMC/Consultant to the contractor within 10 working days from the date of
certificate to the payment from NLUO from time to time . The NLUO shall
recover the statutory recoveries other dues including the retention amount
from the certificate of payment.
The scrutiny commit can verify as and when required after verify by PMC.
Provided always that the issue of any certificate by the Architect/
consultant during the progress of works or completion shall not have effect
as certificate of satisfaction or relive the contractor from his liability under
clause.
The PMC/Consultant shall have power to withhold the certificate if the
work or any part thereof is not carried out to their satisfaction.
The PMC/ Consultant may be any certificate make any correction required
in previous certificate.
The NLUO shall modify the certificate of payment as issued by the
Architect/ consultant from time to time while making the payment.
The contractor shall submit interim bills only after taking actual
measurement and properly recorded in the measurement Book.
The contractor shall not submit interim bills when the ap proximate value of
work done by him less than Rs.3.00 crores and the minimum interval
between two such bills shall be one month.
The final bill may be submitted by contractor within a period of one month
from the date of virtual completion and Arch itect/ Consultant shall issue
the certificate of payment within a period of two months. The NLUO shall
pay the amount within a period of three months from the date of issue of
certificate provided there is no dispute in respect of rates and quantities.
The contractor shall submit the interim bills in the prescribed format with
all details.
48
CONTRACTOR NLUO
36.0 PAYMENT TERMS & CONDITIONS :
85% of the total R.A. Bill submitted shall be paid within 9 (nine) working days from the
date of submission of R.A. Bills. The balance payment deducting the necessary statutory
dues shall be paid only after verification of Bill by National Law University ORISSA /
Project Management Consultant.
37.0 MOBILISATION :
Mobilization advance will be paid @ 10% of the contract value against the submission
of bank guarantee from a nationalized bank as per the performa enclosed, against the
PMC and NLOU representative. The format of getting this payment as mentioned in
page No.62-63 which signed and duly confirm from any Nationalized Bank.The
mobilization advance shall be recovered at the rate of 10% from each running bill when
the work done value reaches 15% of the cointract value.
38.0 PERFORMANCE GUARANTEE :
The performance guarantee is 10% of the total contractor value which is submitted in
form of Bank Guarantee from a Nationalized Bank. Which is valid for 12 (twelve)
months beyond the completion period which will be submitted with in the 15 days from
the date of agreement as per the Performa enclosed.
39.0 Settlement of disputes and Arbitration.
i. Except where otherwise provided in the contract all questions and disputes
relating to own connection with the interpretation, execution or enforcement of
the contract shall be refer to arbitration, abolition and conciliation Act 1996 .
ii thing whatsoever in any way arising out of or relating to the contract, designs,
drawings, specifications, estimates, instructions orders or these conditions or
otherwise concerning the work or the execution or failure to execute the same
whether arising during the progress of the work or after the cancellation,
termination, completion or abandonment thereof shall be dealt with as mentioned
hereinafter.
If the contractor considers that he is entitled to any extra payment or compensation in
respect of the works over and above the amounts admitted as payable by the Architect
or incase the contractor wants to dispute the validity of any deductions or recoveries
made or proposed to be made from the contract or raise any dispute, the contractor
shall forthwith give notice in writing of his claim, or dispute to the Vice
Chancellor, National Law University ORISSA, Chahata, Tulasipur, Cuttack - 753008,
ODISHA and endorse a copy of the same to the Architect, within 30 (thirty) days from
the date of disallowance thereof or the date of deduction or recovery. The said notice
shall give full particulars of the claim, grounds on which it is based and detailed
calculations of the amount claimed and contractor shall not be entitled to raise any
claim nor shall the N.L.U.O be any way liable in respect of any claim by the contractor
unless notice of such claim shall have been given by the contractor to the Vice
Chancellor, National Law University ORISSA, Chahata, Tulasipur, Cuttack - 753008,
49
CONTRACTOR NLUO
ODISHA in the manner and within the time as aforesaid. The contractor shall be
deemed to have waved and extinguished all his rights in respect of any claim not
notified to the Vice Chancellor, National Law University ORISSA, Chahata,
Tulasipur, Cuttack - 753008, ODISHA in writing in the manner and within the time
aforesaid.
ii) Except where the decision has become final, binding and conclusive in terms of the
contract, all disputes or differences arising out of the notified claims of the contractor
as aforesaid and all claims of the N.L.U.O shall be referred for adjudication through
arbitration by the Sole Arbitrator appointed by the Vice Chancellor, National Law
University ORISSA, Chahata, Tulasipur, Cuttack - 753008, ODISHA. It will also be
no objection to any such appointment that the arbitrator so appointed is a N.L.U.O
Officer and that he had to deal with the matters to which the Contract relates in the
course of his duties as N.L.U.O Officer. If the arbitrator so appointed is unable or
unwilling to act or resigns his appointment or vacates his office due to any reason
whatsoever another sole arbitrator shall be appointed in the manner aforesaid by the
said, Vice Chancellor, National Law University ORISSA, Chahata, Tulasipur, Cuttack
- 753008, ODISHA. Such person shall be entitled to proceed with the reference from
the stage at which it was left by his predecessor.
It is a term of this contract that the party invoking arbitration shall give a list of
disputes with amounts claimed in respect of each disputes with amounts claimed in
respect of each dispute along with the notice for appointment of arbitrator.
It is also a term of this contract that no person other than a person appointed by such
National Law University ORISSA, Chahata, Tulasipur, Cuttack - 753008, ODISHA as
aforesaid should act as arbitrator.
The conciliation and arbitration shall be conducted in accordance with the provisions
of the arbitration & Conciliation Act 1996 or any statutory modification or reenactment
thereof and the rules made thereunder.
It is also a term of the contract that the arbitrator shall be deemed to have entered on
the reference on the date he issues notice to both the parties calling them to submit
their statement of claims and counter statement of claims. The venue of the arbitration
shall be such place as may be fixed by the arbitrator in his sole discretion. The fees, if
any, of the arbitrator shall , if required to be paid
before the award is made and published, be paid half and half by each of the parties.
The cost of the reference and of the award (including the fees, if any of the arbitrator)
shall be in the discretion of the arbitrator who may direct to any by whom and in what
manner, such costs or any part thereof, shall be paid and fix or settle the amount of
costs to be so paid.
40.0 Water Supply
The contractor shall make his own arrangement for water required for the
work and nothing extra will be paid for the same. This will be subject to the
following conditions.
50
CONTRACTOR NLUO
(i)That the water used by the contractor shall be fit for constru ction purposes
to the satisfaction of the Architect/ Consultant.
(ii) The contractor shall make alternative arrangement for the supply of
water if the arrangement made by the contractor for the procurement of
water in the opinion of the Architect/ consu ltant is unsatisfactory.
40.1 The contractor shall construct temporary well/ tube well in NLUO land
for taking water for construction purposes only after obtaining permission
in writing from the NATIONAL LAW UNIVERSITY, ORISSA. The
contractor has to make his own arrangement for drawing & distributing
the water at his own cost. He has to make necessary arrangements to avoid
any accidents or damages caused due to construction and subsequent
maintenance of the wells. He has to obtain necessary approval from local
authorities, if required, at his own cost. He shall restore the ground to its
original condition after wells are dismantled on completion of work. Or
and over the well to the NLUO without any compensation as directed by the
Architect/consultant.
41.0 Power Supply
The contractor shall make his own arrangements for power and supply /
distribution system for driving plant or machinery for the work and for
lighting purpose at his own cost, The cost of running and maintenance of the
plants are to included in his tender prices. He shall pay all fees and charges
required for the poser supply and include the same in his tendered rates and
hold the owner free from all such costs. He has to obtain necessary approval
from the appropriate authorities, if required.
42.0 Treasure trove etc.
Any treasure trove, coin or object antique, which may be found on the site,
shall be the property of NLUO and shall be handed over to the N.L.U.O
immediately.
43.0 Method of measurement
Unless otherwise mentioned in the schedule of quantities or in mode of
measurement, the measurement will be on the net quantities or work
produced in accordance with up to date. Rules laid down by the Bureau of
Indian Standards. In the event any dispute / disagreement the decision of
the PMC/ Consultant shall be final and binding on the contractor.
44.0 Maintenance of registers
The contractor shall maintain the following registers as per the enclosed
proforma at site of work and should produce the same for inspection of
NLUO/ architect consultant whenever desired by them. The contractor shall
also maintain the records / registers as required by the local authorities
/Govt. form time to time.
i) Register for cement / paint / lead / specific materials.
ii) Register for steel
51
CONTRACTOR NLUO
iii) Register for secured advance
iv) Register for bulkage of sand
v) Register for silt test
vi) Register for sieve analysis for fine aggregate
vii) Register for sieve analysis for course aggregate
viii) Register for slump test
ix) Register for concrete cube test
x) Register for hindrance to work
xi) Register for consumption of cement
xii) Register for running account bill
xiii) Register for labour
45.0 Price Variation Adjustment (P.V.A.)
Price variation adjustment for all materials including labour in partial
modification of the provision made elsewhere in this contract regarding the
quoted rate being not subject to any variations prices adjustments to the
value of work payable to the contractor at tendered rates shall be paid
towards variation in the prices of materi als and labour in during operating
period of this contract including any authorized extensions of the original
stipulated period of completion.
a) In partial modification of the stipulation that the rates quoted shall be firm
and shall not be subject to any exchange variations, labour conditions,
fluctuations in railway freight and any conditions
whatsoever under this clause any clause any increase or decrease in prices of
materials and labour rates shall be adjusted on the basis of formula given below
:
i) Materials : Vm = 70 [ 0.88 v -(C+S+X) ] x (WI - WIO)
100 WIO
Where :
Vm = Variation in material cost i.e. increase or decrease in the amount in
rupees to be paid or recovered.
V = Value of work done excluding advances on materials, if any during the
period under reckoning.
C = Cost of grey cement used in the work.
Covered by clause 22 of the General Instruction to the contractor and
Special conditions.
S = Cost of Steel used in the work.
X = Cost of any other material supplied at fixed basis rate.
52
CONTRACTOR NLUO
WI = Average All Indian Wholesale Price Index for all commodities for the
period under reckoning as published in the RBI Bulletin. In case the
tender is opened on or before 10th day of a month, on Index, of
previous month shall be considered.
WIO = All India Wholesale Price Index for all Commodities during the
month of opening of the tender, as published in the RBI Bulletin.
ii) LOBOUR : VL = 30 x [ 0.88V - (C+S) ] x (I - IO)
100 IO
Where :
VL Variation in labour cost i.e. increase or decrease in the amount in
rupees to be paid or recovered.
V,S & S As stated under (i) above
I Average All India Consumer Price Index Number for Industrial
Workers declared by Labour Bureau, Government of India as
published in R.B.I. Bulletin, during the period under reckoning.
IO All India Consumer Price Index Number for Industrial Workers
declared by labour Bureau, Government of India, as published in RBI,
Bulletin during the months of opening of the tender. In case the
tenders are opened on or before 10th day of a month the Index for last
month shall be considered.
1. Adjustments based on the above formulae will be made for each bill as and
when the indices are published. The contractors shall submit the bill for
price adjustment with details calculations.
2. The downward adjustment on account of labour element will be made only
if the minimum wages also register corresponding fall compared to the
minimum wages prevailing in the month of opening of the tenders.
3. The prices adjustment clause shall be applicable only for the work executed
during the contract period including authorised extension, if any. In case
the work is not completed within the contract period including authorised
extension and the provision of liquidated damages has to be enforced, this
adjustment clause will not be applicable for work done during that period.
It is also clarified that price adjustment clause will not be applicable for
work done during that period. It is also clarified that price adjustment
clause will not be applicable to any extra variation items, the rates of which
are based on prevailing market rate.
4. In view of the price adjustment in cost being covered as above, no other
adjustments viz., increase or decrease due to statutory measures / le vies,
etc., will be allowed for any reason whatsoever.
5. In case the bill is submitted to the NLUO/PMC prior to 15th of a particular
month, index for that month will not be reckoned for calculating the
average indices for arriving at the adjustment. If ho wever, the bill is
53
CONTRACTOR NLUO
submitted on or after 15th Index for that particular month shall be taken
into consideration.
6. Immediately on award of contract, the contractor shall register with the
appropriate authority obtain Sales Tax Registration No. and produc e the
details thereof to the N.L.U.O within 30 days of the award of the work and
in no case later than the submission of his first running bill.
7. The successful tenderes may also note that the N.L.U.O reserves the right
to deduct Sales Tax on works contract applicable and to be levied under
relevant Act, from the bills and amount due to them from N.L.U.O and
remit the same directly to the Government in case they are not submitting
the proof / evidence of having paid the Sales Tax on work executed under
this contract.
Note : No price variation shall be consider ed with in 24 (twenty four) month from
the date of acceptance of tender.
46.0 Force Majeure
46.1 Neither contractor nor NLUO shall be considered in default in performance
of their obligations if such performance is prevented or delayed by events
such as but not to war, hostilities revolution, riots, civil commotion,
strikes, lockout, conflagration, epidemics, accidents, fire, storms, floods,
droughts, earthquakes or ordinances or any act of god or for any other cause
beyond the reasonable control of the party affected or prevented or delayed.
However a notice is required to be given within 30 days from the happening
of the event with complete details, to the other party to the contract, if it is
not possible to serve a notice; within the shortest possible period without
delay.
46.2 As soon as the cause of force majeure has been removed the party whose
ability to perform its obligations has been affected, shall notify the other of
such cessation and the actual delay incurred in such affected activity
adducing necessary evidence in support thereof.
46.3 From the date of occurrence of a case of force majeure obligations of the
party affected shall be suspended during the continuance of any inability so
caused. With the cause itself and inability resulting there from having been
remove, the agreed time of completion of the respective obligations under
this agreement shall stand extended by a period equal to the period of delay
occasioned by such events.
46.4 Should one or both parties be prevented from fulfilling the contractual
obligations by a state of force majeure lasting to a period of 6 months or
more the two parties shall each other to decide regarding the future
execution of this agreement.
47.0 Local laws, Acts, Regulations:
The contractor shall strictly adhere to all prevailing labour laws inclusive
of contract labour (regulation and abolition act of 1970) and other safety
54
CONTRACTOR NLUO
regulations. The contractor shall company with the provision of all labour
legislation including the latest requirements of all the Acts, laws any other
regulations that are applicable to the execution of the project.
i) Minimum wages Act 1948 (Amended)
ii) Payment of wages Act 1936 (Amended)
iii) Workmen‟s compensation Act 1923 (Amended)
iv) Contract labour regulation and abolition act 1970 and central rules 1971
(Amended)
v) Apprentice act 1961 (Amended)
vi) Industrial employment (standing order) Act 1946 (Amended)
vii) Personal injuries (Compensation insurance) act 1963 and other
modifications
viii) Employees‟ provident fund and miscellaneous provisions Act 1952 and
amended thereof.
ix) Shop and establishment act.
x) Shop and establishment act.
xi) Royalty shall be charged as applicable by Govt. of Odisha.
xii) Any other act or enactment relating thereto and rules framed there under
from time to time.
48.0 Supply of man power for supervision of the Project.
The contractor shall ensure the supply of the manpower with required
qualification for this project. These engineer and s upervisor will look after
day to day activities of work. They will also maintained the required
documents to be submitted to PMC on regular basic and endorse it.
MINIMUM REQUIREMENT OF TECHNICALREPRESENTATIVE
FROM THE CONTRACTOR SIDE.
Sl. Minimum Discipline Designation Minimum Minimum
No. Qualification of Experience
technical
representative
1 Degree Civil Project 15 Years 1 No.
Manager
2 Degree Civil Sr. 10 Years 2 Nos.
Engineer
3. Diploma Civil Billing 8 Years 2 Nos.
55
CONTRACTOR NLUO
Engineer
4. Diploma Civil Quality 8 Years 2 Nos.
Control
Engineer
5. Diploma Civil Planning 8 Years 1 Nos.
Engineer
6. Diploma Civil Safety 6 Years 1 Nos.
Engineer
7. Supervision Civil, 5 Years 6 Nos.
Staff Electrical,
P.H, Road,
Drainage
work and
fire safety
work
49.0 Accidents.
The contractor shall immediately on occurrence of any accident at or about
the site or in connection with the execution of the work report such
accident to the PMC/ Consultant. The contractor shall also such report
immediately to the competent authority when ever such report is required to
be lodged by the law and take appropriate actions thereof.
50.0 Idle Labour.
Whatever the reasons may be, no claim for idle labour, additional establishment cost of
hire & labour charges of tools and plants would be entertained under any
circumstances.
51.0 EXTRA ITEMS, VARIATIONS, THEIR VALUATION AND CLAIMS
51.1 If any item is ordered on the Contractor by NLUO which is neither in the tender
document, Description of works in the Schedule, specifications, it shall be treated as
extra item. The Contractor shall carry out and complete the said work on prior approval
from the NLUO/ PMC in every respect to the satisfaction of NLUO. The rates of extra
items shall be derived on the following basis of precedence:
(i) Rates available in OPWD of (Standard Schedule of rates).
(ii) As per the market rates evaluated by NLUO.
Extra items on market rates will be applicable only when certificate is issued by PMC/
Project Director .
56
CONTRACTOR NLUO
SPECIAL CONDITIONS OF CONTRACT
Scope of work
1.0 The scope of work is to carry out all works in connections with
Construction external development works of National Law University
Campus Works at Naraj, Cuttack, ODISHA.
2.0 Address of site
The site is located at Naraj, Cuttack, ODISHA.
3.0 Dimensions and levels
All dimensions and levels shown on the drawing shall be verified by the
contractor on the site and he will be held responsible for the accuracy and
maintenance of all the dimensions and the levels. Figured dimensions are in
all cases to accepted and no dimension shall be scaled. Large scale details
shall take precedence over small -scale drawings. In case of discrepancy the
contractor shall ask for clarification from the PMC/ Consultant before
proceeding with the work.
4.0 Notice of operation
The contractor shall not carryout any important operation without the
Consent in writhing from the PMC/ Consultant.
5.0 Consultant records
The contractor shall keep and provide to the PMC/ Consultant full and
accurate records of the dimensions and positions of all n ew work and any
other information necessary to prepare complete drawing recording details
of the work as constructed.
6.0 Safety of adjacent structures and trees
The contractor shall provide and erect to the approval of the PMC/
Consultant such supports as may be required to protect effectively all
structures and protective guards to trees which may be endangered by the
execution of the works or otherwise take such permanent measures as may
be required by the Architect to protect the trees and structures.
7.0 Temporary works
Before any temporary works are commenced the contractor shall submit at
least 7 days in advance to the architect /consultant for approval complete
drawings of all temporary works he may require for the execution of the
works. The contractor shall carry out the modifications relating to strength,
if required by the PMC/ Consultant may require in accordance with the
conditions of contract at his own cost. The contractor shall be solely
responsible for the stability and safety of all tempo rary works and
57
CONTRACTOR NLUO
unfinished works and for the quality of the permanent works resulting from
the arrangement eventually adopted for their execution.
8.0 Temporary roads
The contractor shall provide access roads to the site from the nearest main
road at no extra cost and as directed by the PMC/ Consultant. The
contractor shall also responsible for proper maintenance of this access road
and would take all care to see that existing services, if any, are maintained
in working order at his own cost. The laying and maintaining the temporary
roads within the site area shall be the contractor‟s responsibility and the
contractor shall take such measures that necessary and as directed by the
PMC/ Consultant.
9.0 Water, power and other facilities
a) The rate quoted by the contractor shall include all expenses that are
required for providing all the water required for the work and the contractor
shall make his own arrangements for the supply of good quality water
suitable for the construction and good quality drinking wate r for their
workers. If necessary the contractor has to sink a tube well / open well and
bring water by means of tankers at his own cost for the purpose. The NLUO
will not be liable to pay any charges in connection with the above.
a) The rate quote in the tender shall include the expenses for obtaining and
maintaining power connections and shall pay for the consumptions charges.
b) The contractors for other trades directly appointed by the NLUO shall be
entitled to take power and water connections from the temporary water and
power supply obtained by the contractor. However the concerned contractor
shall make their own arrangements to draw the supply and pay directly the
actual consumption charges at mutually agreed rates between them. All
municipal charges for drainage and water connection for construction
purposes shall be borne by the contractor and charges payable for
permanent connections, if any, shall be initially paid by the contractor and
the NLUO will reimburse the amount on production of receipts.
a) The NLUO as well as the PMC/ Consultant shall give all possible assistance
to the contractors to obtain the requisite.
b) Permission from the various authorities, but the responsibility for obtaining
the same in time shall be of the contractor.
10.0 Office accommodation
a) The contractor shall provide and maintain all necessary offices, workshops,
stores, shelters, sanitary facilities, canteens and other temporary structures
for themselves in connection with the work at the site at their own cost
after getting the approval form the PMC/ Consultant.
58
CONTRACTOR NLUO
b) A site office for the use of NLUO & PMC shall be provided by the
contractor at his own expenses as per the requirement given by NLUO &
PMC.
c) All temporary buildings and facilities as mentioned above shall be removed
on completion of the work or at any other earlier date as directed by the
PMC/ Consultant.
All the expenses for obtaining statutory approvals and maintenance of the
above facilities as well as running expense shall be borne the contractor at
no extra cost. It is also the responsibility of the contractor to obtain
statutory approvals for providing the above facilities.
11.0 Facilities for contractor‟s employees
The contractor shall make his own arrangement for the housing and welfare
of his staff and workmen including adequate drinking water facilities. The
contractor shall also make she arrangements at his own cost for transport
where necessary for his staff and workmen to and from site of work at his
own cost.
12.0 Lighting of works
The contractor shall at all times provide adequate and approved lighting as
required for the proper execution and supervision and inspection of work.
13.0 Fire fighting arrangements
i) The contactor shall provide suitable arrangement for fire fighting at his
own cost. For this purpose he shall provide requisite number of fire
extinguishers and adequate number of buckets, some of which are to be
always kept filled with sand and some with water. These equipments shall
be provided at suitable prominent and easily acces sible places and shall be
properly maintained.
ii) Any deficiency in the fire safety or unsafe conditions shall be corrected by
the contractor at his own cost and to the approval of the relevant
authorities. The contractor shall make the following arrangem ents at his
own cost but limited to the following.
a) Proper handling, storage and disposal of combustible materials and waste.
b) Work operations which can create fire hazards.
c) Access for fire fighting equipments.
d) type, number and location of containers for the removal of surplus materials
and rubbish.
e) Type, size, number and location of fire extinguishers or other fire fighting
equipment.
f) General house keeping.
59
CONTRACTOR NLUO
14.0 Site order book
A site order book shall be maintained at site for the purpos e immidate
verification of between the NLUO/Architect /PMC. Any communication
relating to the works may be conveyed through. Records in the site order
book. Such a communication from one party to the other shall be deemed to
have been adequately served in terms of contract. Each site order book shall
have machine numbered pages in triplicate and shall carefully maintained
and preserved by the contractor and shall be made available to the PMC/
Consultant as and when demanded. Any instruction which the PMC/
Consultant may like to issue to the contractor or the contractor may like to
bring to the PMC/ Consultant two copies of such instructions shall be taken
from the site order book and one copy will be handed over to the party
against proper acknowledgment and the second copy will be retained for
their record.
15.0 Temporary fencing / barricading
The contractor shall provide and maintain a suitable temporary fencing /
barricading and gates at his cost to adequately enclose all boundaries of the
site for the protection of the public and for the proper execution and
security of the work and in accordance with the requirement of the PMC/
Consultant and regulations of local authorities. These shall be altered,
relocated and adopted from time to tome as necessar y and removed on
completion of the work.
16.0 Site meetings
Site meetings will be held to review the progress and quality evaluation.
The contractor shall depute a senior representative along with the site
representative and other staff of approved sub -contractors and supplies as
required to the site meetings and ensure all follow up actions. Any
additional review meetings shall he held if required by the PMC/
Consultant.
17.0 Disposal of refuse
The contractor shall cart away all debris, refuse etc. aris ing from the work
from the site and deposit the same as directed by the PMC/ Consultant at
his own cost. It is the responsibility of the contractor to obtain from the
local authorities concerned to the effect that all rubbish arising out of
contractor‟s activities at the construction site or any other off -site activities
borrow pits has been properly disposed off.
18.0 Contractor to verify site measurement
The contractor shall check and verify all site measurement whenever
requested by other specialists contractors or other sub contractors to enable
them to prepare their own shop drawings and pass on the information with
sufficient promptness as will not in any way delay the works.
19.0 Displaying the name of the work
60
CONTRACTOR NLUO
The contractor shall put up a name board of suitable size as directed by the
PMC/ Consultant indicating therein the name of the project and other
details as given by the PMC/ Consultant at his own cost and remove the
same on completion of work.
20.0 Bar bending schedule
The contractor shall prepare a detailed bar bending schedule for all
reinforced concrete works and got them approved by the PMC/ Consultant
well in advance.
21.0 As built drawings
i) For the drawings issued to the contractor by the PMC. The PMC/
Consultant will issue two sets of drawings to the Contractor for the items
for which some changes have been made. From the approved drawings as
instructed by the NLUO/ PMC. The contractor will make the changes made
on these copies and return these copies to the PMC/ Consultant for their
approval. In case any revision is required or the corrections are not
properly marked the PMC/ Consultant will point out the discrepancies to
the contractor. The contractor will have to incorporate these corrections and
/ or attend to discrepancies either on the copies as directed by the PMC/
Consultant and resubmit to his for approval. The PMC/ Consultant will
return one copy duly approved by him.
ii) For the drawing prepared by the contractor.
The contractor will modify the drawing prepared by hi m wherever the
changes are made by the NLUO/ PMC/ Consultant. And submit two copies
of such modified drawing to the PMC/ Consultant for approval. The PMC/
Consultant will return one copy of the approved drawing to the contractor.
22.0 Approved make
The contractor shall provide all materials from the list of approved makes
and ISI marked at his own cost and also appoint the specialised agency for
the waterproofing, anti-termite, aluminium doors and windows and any
other item as specified in the tender . Th e PMC/ Consultant may approve
any make / agency within the approved as given at the time of tender list as
given in the tender after inspection of the sample / mock up.
23.0 Procurement of materials
The contractor shall make his own arrangements to procu re all required
materials and ISI marked for the work. All wastages and losses in weight
shall be to the contractor‟s account.
24.0 Excise duty, taxes, levies etc.
The contractor shall pay and be responsible for payment of all taxes,
duties, levies, royalties, fees, cess or charges in respect of the works
61
CONTRACTOR NLUO
including but not limited to sales tax, tax on works contract excise duty,
and octroi, payable in respect of materials, equipment plant and other
things required for the contact. All of the aforesaid ta xes, duties, levies,
fees and charges shall be to the contractor‟s account and the NLUO shall
not be required to pay any additional or extra amount on this account.
Variation of taxes, duties, fees levies etc if any, till completion of work
shall be deemed to be included in the quoted rates and no extra amount on
this account. Variation of taxes, duties, levies etc, if any, till completion of
work shall be deemed to be included in the quoted rates and no extra claim
on this account will in any case be enter tained. If a new tax or duty or levy
or cess or royalty or octroi is imposed under as statue or law during the
currency of contract the same shall be borne by the contractor.
25.0 Acceptance of tender
The NLUO shall have the right to reject any or all te nders with out
assigning any reason. They are not to bound to accept the lowest or any
tender and the tenderer or tenderers shall have no right to question the act
of the NATIONAL LAW UNIVERSITY, Orissa. However adequate
transparency would be maintained b y the NATIONAL LAW UNIVERSITY,
Orissa.
62
CONTRACTOR NLUO
SAFETY CODE
1. First aid appliances including adequate supply of sterilised dressing and
cotton wool shall be kept in a readily accessible place.
2. An injured person shall be taken to a public hospital without loss of time in
cases where the injury necessitates hospitalisation.
3. Suitable and strong scaffolds should be provided for workmen for all works
that cannot safely be done from the ground .
4. No portable single ladder shall be over 8 meters in length. The wi dth
between the side rails shall not be less than 30 cm. (clear) and at the
distance between two adjacent rungs shall not be more than 30 cm. When a
ladder is used an extra mazdoor shall be engaged for holding ladder.
5. The excavated material shall not be placed within 1.5 meters of the edge of
the trench or half of the depth of trench whichever is more. All trenches
and excavations shall be provided with necessary fencing and lighting.
6. Every opening in the floor of a building or in a working platform b e
provided with suitable means to prevent the fall of persons or materials by
providing suitable fencing or failing whose minimum height shall be one
metre.
7. No floor , roof or other part of the structure shall be so overloaded with
debris or materials as to render it unsafe.
8. Workers employed on mixing and handling material such as asphalt ,
cement mortar or concrete and lime mortar shall be provided with
protective footwear and rubber hand-gloves.
9. Those engaged in welding works shall be provided wi th welder‟s protective
eye shields and gloves.
10. i) No paint containing lead or lead products shall be used except in the
form of paste or readymade paint.
ii) Suitable facemasks, should be supplied for use be the workers when
the paint is applied in the form of spray or surface having lead paint
dry rubbed and scrapped.
11. Overall shall be supplied by the contractor to the painters and adequate
facilities shall be provided to enable the working painters to wash during
the periods of cessation of work.
12. Housing machines and tackle used in the works, including their
attachments, anchorage and supports shall be in perfect condition
13. The ropes used in hoisting or lowering material or as a means of suspension
shall be of durable quality and adequate st rength and free from defects.
63
CONTRACTOR NLUO
N.L.U.O‟S UNIVERSITY CAMPUS WORK PROJECTS - MAINTENANCE OF
RECORDS
A. Registers at the site office of the N.L.U.O‟s Engineer :
1. Drawing register.
2. Hindrance Register.
3. Concrete cube Test Register.
4. File and Register for extra / variation items.
5. Materials tests Register and file.
6. Site Order Book (triplicate).
7. Site visit & Instructions Register.
8. Certified true copies of the contracts.
MOBILISATION ADVANCE
At the request of the Contractor mobilization advance to a maximum of 10.0 % (Ten
Percent) of the contract amount against Bank Guarantee from a Nationalized Bank shall
be paid by NLUO . This shall be paid in two equal installments against equivalent Bank
Guarantee . The First Installment of mobilization advance of 5 % ( five percent) of
contract value shall be paid at the time of award of work and on certification of proper
and satisfactory mobilization at site. Balance mobilization advance of 5% (five) of
contracts value against Bank Guarantee bonds from Nationalized Bank shall be payable
after submitting the 1st RA bill. However the first installment of mobilization advance
will be release on the finalization of bar chart duly approved by NLUO and signed by the
Contractor, and Project Director, receipt of certificate from Project Director and
Architect/ PMC regarding satisfactory mobilization at site.
RECOVERY OF MOBILISATION ADVANCE
i) Initial mobilization advance of 10 % shall be recovered from the RA bills when
the work done value reaches 15% of the contract value at the rate of 10% .
64
CONTRACTOR NLUO
PROFORMA OF LETTER OF ACCEPTANCE OF TENDER
REGISTERED A.D.
To,
M/s …………………………….
………………………………….
………………………………….
Dear Sirs,
NAME OF THE WORK
Please refer to your letter No. __________________ dated __________________ on the
captioned subject. We are pleased to inform that your tender for the above mentioned work has
been accepted by our clients NLUO at the rates quoted by you for a total cost of
Rs.___________________
(Rupees __________________________________________)
In this connection, it may please be noted that the following letters will form part of the contract
document:
i) Your letter No. ________________ dated _______________ addressed to
___________________
ii)
iii)
iv)
You are requested to all on us to execute the formal agreement within 15 days from the date of
receipt of the LOA or the date of handing over the site whichever is later.
You are requested to submit Initial Security Deposit of Rs._________ by means of DD drawn in
favour NLUO within a period of _______________
You are also requested to start the work at once in consultation with ________________.
Please note that the time allowed for completion of work is _______________ months, which
shall be reckoned from 15th day of receipt of this letter or date of handing over the site
whichever is later.
Please note that time will be the essence of the contract.
You are further requested to take out necessary insurance covers, indemnity bonds, labour
permissions at your cost in terms of clause __________ and ____________ conditions of the
contract.
Please acknowledge receipt of this letter.
Architects
COPY to Vice Chancellor of NLUO , for information.
Place :………………….
Date :…………………..
65
CONTRACTOR NLUO
(On non-judicial stamp paper of Rs.100/-)
BANK GUARANTEE IN LIEU OF SECURITY DEPOSIT
B.G. No. _______________ Value Rs. …………………...
National Law University ORISSA
(Address)
Sub: Bank Guarantee of Rs. ………………… towards Security Deposit for the work of
for National Law University ORISSA .
(Name of Branch/Office)
Dear Sir,
WHEREAS (Name and address of contractor/vendor) (hereinafter called the Contractor) have
entered into contract for (Name of Work) with National Law University ORISSA (NATIONAL
LAW UNIVERSITY, ORISSA) as mentioned in the letter of NATIONAL LAW
UNIVERSITY, ORISSA‟s Consultants (Name & address of consultants) vide their letter No.
…………….. dated ……………………. and the correspondence and tender relating thereto
which is hereinafter referred to as “the said contract” and that the Contractor has agreed to
produce a bank Guarantee amounting to 2% of the contract value less earnest money deposit of
Rs…………………. (Rupees only), to National Law University ORISSA for performing their
part of the contract obligations their liability ceases.
AND WHEREAS in terms of the said Contract, the contractor is required to furnish to National
Law University ORISSA a Guarantee of a Scheduled bank for a value of Rs……………….. to
be valid upto (date).
AND WHEREAS (Name of bank and its branch) having their office at (address) the Guarantor,
at the request of the contractor hereby furnishes a guarantee in favour of National Law
University ORISSA and Guarantees in the manner hereinafter appearing.
In consideration of the premises, we (name of bank and its branch) having our office at (address)
hereafter called the “Guarantor” (which expression shall include its successors and assigns)
hereby expressly, irrevocably and unreservedly undertake and guarantee that if the Contractor
fails to execute the work according to his obligations under the said contract, then not with
standing any dispute between National Law University ORISSA and the contractor the
Guarantor shall, without demur and without reference to the contractor pay to National Law
University ORISSA immediately any sum claimed by National Law University ORISSA under
the said contract upto a maximum amount of Rs………………….. (Rupees only).
In case the amount demanded by National Law University ORISSA is not paid within 48 hours
of receipt of demand, the Guarantor agrees to pay the aforesaid amount of Rs.--------------
(Rupees ------------------------------- only).
1. Such payment shall be notwithstanding any right the contractor may have directly against
National Law University ORISSA or any disputes raised by the Contractor with National
Law University ORISSA or any suits or proceedings pending in any competent court or
before any arbitrator. National Law University ORISSA ‟s written demand shall be
conclusive evidence to the Guarantor that such payment is payable under the terms of the
Contract and shall be binding in all respect on the guarantor.
66
CONTRACTOR NLUO
2. The Guarantor shall not be discharged or released from this undertaking and Guarantee, by
any arrangement, variations made between NLUO and the Contractor and or indulgence
shown to the contractor by NATIONAL LAW UNIVERSITY, ORISSA, with or without the
consent and knowledge of the guarantor or by alternations in the obligations of the
contractor by any forbearance, whether as to payment, time performance or otherwise.
3. This guarantee shall remain valid until 36 months or as may be caused to be extended by the
contractor or until discharged by NLUO in writing whichever is earlier.
4. (a) This guarantee shall be continuing guarantee and shall not be revoable during its
currency except with the previous written consent of NATIONAL LAW
UNIVERSITY, ORISSA.
(b) This guarantee shall not be affected by any change in the constitution of the contractor,
by absorption with any other body or corporation or dissolution or otherwise and this
guarantee will be available to or enforceable against such body or corporation.
5. In order to give effect to this guarantee NLUO will be entitled to at as if the Guarantor were
the Principal debtor and the Guarantor hereby waives all and any of its rights or surety ship.
6. This guarantee shall continue to be in force notwithstanding the discharge of the contractor
by operation of law and shall cease only on payment of the full amount by the Guarantor to
NLUO of the amount hereby secured.
7. This guarantee shall be in addition to and not in substitution for any other guarantee or
security for the contractor given or to be given to NLUO in respect of the said contract.
8. Any notice by way of request and demand or otherwise here under may be sent by post or
any other mode or communication to the guarantor addressed as aforesaid and if sent by post
it shall be deemed to have been given at the time when it would be delivered in due course
of post and in providing such notice when given by post it shall be sufficient to prove that
the envelope containing the notice was posted and a certificate signed by an officer of
NLUO that the envelope was so posted shall be conclusive.
9. These presents shall be governed by and constructed in accordance with Indian Law.
Not withstanding anything contained hereinbefore the liability of the guarantor under this
guarantee is restricted to a sum of Rs. ……………………
The guarantee will remain valid upto …………………… unless a demand or claim under this
guarantee is made in writing on or before ……………………. the guarantor shall be discharged
from all liability under the guarantee thereafter.
Dated the ………………………………
For (Name of Bank)
(Signature/s with designation/s of signatory/ies)
(Name and Stamp of Bank)
67
CONTRACTOR NLUO
LETTER OF GUARANTEE FOR MOBILISATION ADVANCE
(TO BE STAMPED AS A SECURITY BOND)
The Registrar .
National Law University ORISSA .
Chahata, Tulasipur,
Cuttack - 753008, ODISHA
Dear Sirs,
N.L.U.O‟s Proposed National Law University Campus Works at Naraj, Cuttack.
WHEREAS
(1) You have awarded a contract for civil work in respect of the construction of your N.L.U.O‟s
own National Law University Campus Works at Naraj,Cuttack to our constituents
_______________________________a Company / firm having its registered office/office at
________________________ (hereinafter referred to as “the Contractors”, which
expression shall include its successors and assigns) in terms of which the National Law
University ORISSA has agreed to advance to the contractors a sum of Rs. ___________
(Rupees _________________ only) as and by way of mobilisation advance in order to
enable them for making arrangements for producing necessary materials for the construction
work and for tools, plant, equipment, etc.
(2) The Contractors have vide their letter dated ____________ requested the National Law
University ORISSA to grant them a sum of Rs. ___________ (Rupees ________________
only) as and by way of mobilisation advance which the National Law University ORISSA
has agreed to grant subject to the terms and conditions as set out in their letter No.
_____________ dated ____________.
(3) One of the terms of the said letter dated _____________ requires the Contractors to furnish
bank guarantee satisfactory to the National Law University ORISSA to secure the said
advance.
(4) It is agreed by and between the parties to the said contract that the said bank guarantee may
be furnished by us.
NOW THEREFORE THIS LETTER OF GUARANTEE WITNESSES that in consideration of
the National Law University ORISSA on our request agreeing to advance a sum of Rs.
____________ (Rupees _________________ only) as a and by way of mobilisation advance
subject to the terms and conditions as set out in the National Law University ORISSA ‟s letter
No. _____________ dated ______________ addressed to the Contractor, we the (Name of
bank) hereby agree and undertake to the National Law University ORISSA as follows:
(i) that the Contractors shall duly perform and discharge their obligations under the said
contract to the full satisfaction of the National Law University ORISSA and that they
shall utilise the said mobilisation advance exclusively for the purpose of making
preliminary construction of the aforesaid project for the National Law University
ORISSA at Naraj, Cuttack and for no other purpose.
68
CONTRACTOR NLUO
(ii) that in case the Contractors do not repay principal amount or pay the interest on said
advance on the due dates or do not present their Running Bills for payment to the
National Law University ORISSA so that the National Law University ORISSA is not
in a position to adjust the said advance from out of the bills payable to the contractors or
the contractors fail to repay the said advance or pay interest thereon or any part thereof
on due dates or on demand, by the National Law University ORISSA or on the
occurrence of any of the events specified in the said contract that may lead to the
termination of the contract, we the (Name of the bank) hereby guarantee and undertake
to pay to the National Law University ORISSA on demand without demur the said sum
of Rs.___________________ (Rupees ____________________ only) or such
unadjusted portion thereof together with interest @ ____________ % per annum accrued
due thereon within a period of one week from the date of receipt of the demand from the
National Law University ORISSA .
(iii) that any statement made by the National Law University ORISSA and the amount
mentioned in the demand notice given to us shall not be called in question by us and
shall be a conclusive proof regarding the amount that is payable by us under this
guarantee and that we shall not demand any proof thereof.
(iv) that we will make the payment pursuant to the demand notice issued by the National
Law University ORISSA , notwithstanding any dispute that may exist or arise between
the National Law University ORISSA and the Contractors or any other person.
(v) that this guarantee shall not be revoked by us without prior consent in writing of the
National Law University ORISSA .
WE HEREBY FURTHER AGREE THAT:
(a) any forbearance, act or omission on the part of the National Law University ORISSA in
enforcing any of the conditions of the said contract or granting of any time or the showing of
any indulgence by the National Law University ORISSA to contractors in respect of the
completion of the building or any other matter in connection therewith shall not discharge us
in any way and our obligations under this guarantee shall be discharged only by payment in
full of the sums guaranteed hereunder.
(b) Our liability under these presents shall not exceed the sum of Rs. _________ (Rupees
_________________________ only) and interest @ ______% per annum accruing due
thereon.
(c) Our liability under this guarantee shall not be affected by any infirmity or irregularity on the
part of the contractors in entering into the said contract or by the dissolution or change in the
constitution of the contractor firm.
(d) Our liability under these presents will terminate on the issue of the Virtual
Completion Certificate by the Architects/N.L.U.O pursuant to the said contract and unless a
claim, suit or action is filed against us within 6 months thereafter all the rights of the
National Law University ORISSA against us under this guarantee shall be
69
CONTRACTOR NLUO
forfeited and we shall be released and discharged from all our obligations and liabilities
hereunder.
Yours faithfully,
For and on behalf of
(National Law University ORISSA )
(Authorised Official)
N.B.: This guarantee will require stamp duty as applicable in the state, where it is executed and
shall be signed by the official whose signature and authority shall be verified.
70
CONTRACTOR NLUO
BANK GUARANTEE FOR PERFORMANCE
Whereas the NATIONAL LAW UNIVERSITY ORISSA, CUTTACK (hereinafter called
NLUO which expression shall include its successors and assigns) having awarded a work
order/contract/supply order No……………………., ………………………. dated
………………………… & …………………………… (hereinafter called the contract) to
…………………………………………….(hereinafter called the contractor/supplier) at a total
price of Rs……………………………… subject to the terms and conditions contained in the
contract.
WHEREAS, the terms and conditions of the contract require the contractor (Contractor) to
furnish a bank guarantee for Rs……………………. (Rupees
……………………………………………………………………………… only) being 10% of
the total value of the contract for proper execution and due fulfillment of the terms and
conditions contained in the contract.
We, ………………………………………………………………………(Nationalised “Bank”)
having our registered office at ……………………………………………………………..do
hereby unconditionally and irrevocably undertake to pay to NLUO immediately on demand in
writing and without protest/or demur the amount mentioned in the guarantee. Any such demand
made by NLUO on the bank shall be final and conclusive. However, the Bank‟s liability under
this guarantee shall be limited to Rs………………………………. in the aggregate and the bank
hereby agrees to the following terms and conditions:-
i) This guarantee shall be continuing guarantee and irrevocable for all claims of NLUO as
specified above and shall be valid during the period specified for the performance of the
contract including the period of maintenance/warranty i.e. up to
…………………………….
ii) We, the said bank further agree with NLUO that NLUO shall have the fullest liberty
without our consent and without affecting in any manner our obligations and liabilities
hereunder to vary any of the terms and conditions of the said contract or to extend time for
performance of contract by the contractor from time to time or to postpone for any time or
from time to time any of the powers exercisable by NLUO against the contractor/supplier
under the contract and forbear or enforce any of the terms and conditions relating to the
said contract and we shall not be relieved from our liability by reason of any such
variations or extension being granted to the contractor or for any forbearance, act or
omission on the part of NLUO or any indulgence by NLUO to the contractor or by any
such matter or thing whatsoever, which under the law relating to the sureties would, but
for this provision, have effect of so relieving us.
iii) This guarantee/undertaking shall be in addition to any other guarantee or security
whatsoever NLUO may now or at anytime have in relation to the performance of the
works/equipment and the company shall have full re-course to or enforce this security in
preference to any other security or guarantee which the NLUO may have or obtained and
there shall be no forbearance on the part of the NLUO in enforcing or requiring
enforcement of any other security which shall have the effect of releasing the Bank from
its full liability. It shall not be necessary for NLUO to proceed against the said
contractor/supplier before proceeding against the Bank.
71
CONTRACTOR NLUO
iv) This guarantee/undertaking shall not be determined or affected by the liquidation or
winding up, dissolution or change of constitution or insolvency of the supplier/contractor,
but shall in all respects and for all purposes be binding and operative until payment of all
moneys payable to NLUO in terms thereof are paid by the Bank.
v) The Bank hereby waives all rights at any time inconsistent with the terms of this
Guarantee and the obligations of the bank in terms hereof, shall not be otherwise affected
or suspended by reason of any dispute or disputes having been raised by the
supplier/contractor (whether or not pending before any Arbitrator, Tribunal or Court) or
any denial of liability by the supplier/contractor stopping or preventing or purporting to
stop or prevent any payment by the Bank to NLUO in terms hereof.
We, the said Bank, lastly undertake not to revoke this guarantee during its currency except with
the previous consent of NLUO in writing. Unless a claim is made in writing within sixty days
after the date of expiry of this guarantee i.e. ……………………………., we shall be relieved
from all liabilities under this guarantee thereafter.
Notwithstanding anything contained herein:
1. Our liability under this Bank guarantee shall not exceed ……………………………….
((Rupees
……………………………………………………………………………………………
………… only).
2. This Bank Guarantee shall be valid up to ………………………… and we are liable to
pay the guaranteed amount or any part thereof under this Bank Guarantee only if you
serve upon us a written claim or demand on or before …………………………………..
(including claim period).
Signed this ……………………………… day of …………………………….
at……………………………………
WITNESS For and on behalf of Bank
Signature & Seal
72
CONTRACTOR NLUO
PROFORMA OF MONTHLY PROGRESS REPORT
Name of work :
Progress report for the month :
Report No. :
Sr. Description Details of location where Approximate
No work is done quantity executed
A. General Building Work:
1. Foundation work
2. Reinforcement fabrication
3. Shuttering work
4. Reinforced cement concrete
5. Masonry work
6. Wood work
7. Plastering work
8. Flooring work
9. Glazing work
10. Roof treatment work
11. Painting work
B. PEST CONTROL TREATMENT
C. SECURITY EQUIPMENT WORK
D. SANITARY AND PLUMBING
WORK:
1. Water supply
2. Drainage work
3. Fittings and fixtures
E. ELECTRICAL INSTALLATION
WORK
F. AIRCONDITIONING WORK
G. OTHER TRADES
73
CONTRACTOR NLUO
RECEIPT OF MATERIALS AT SITE
Sl No. Description Opening Receipt Consumpt Closing Total
balance during ion during balance quantity
month month received
till date
1. Cement (M.T)
2. Mild Steel M.T)
3. Tor Steel (M.T)
4. Coarse
aggregate
(cu.mt.)
5. Fine aggregate
(cum)
6. Teak wood
(cum)
7. Bricks (Nos.)
8. Tiles (Nos.)
Sl Description of work Date of Due date of Percentage progress
No. commence completion achieved.
ment
1. General Building Works.
2. Security equipment work.
3. Pest control treatment work.
4. Sanitary & Plumbing work.
5. Electrical work.
6. Air conditioning work.
7. Other works.
74
CONTRACTOR NLUO
PROFORMA OF CONCRETE CUBE TEST REPORT
1. Name of the Project___________________________________________
2. Name of the Contractor________________________________________
Sr. Date of Identification Mark and location Mix Date of Crushing
No. casting in which the representative proportion testing strength as on
concrete is placed the date of test
1 2 3 4 5 6
Crushing strength as Average crushing strength Remarks Signature of the site
on the 28th day (Average of 3 companion cubes) Engineer
as on the 28th day
7 8 9 10
75
CONTRACTOR NLUO
PROFORMA OF MEASUREMENT BOOK
1st page:
NATIONAL LAW UNIVERSITY ORISSA
………………….office,
Measurement Book No.
(Pages 1 to ………………….)
This book is issued to Shri……………………………………………………………….
Signature of Vice Chancellor , NLUO
Certified that this book contains………………………pages
Signature of the official
To whom the book is issued
MEASUREMENT BOOK PAGES NOS. 1 TO ……………
Item Description Measurements. Quantity Remarks
No. No.L B D/H
Engineer NLUO . Architect/Consultant. Contractor
Checking/Test checking Engineer Date of checking/Test checking
NOTE:
Checking and test checking pertains to items wherever initialed.
76
CONTRACTOR NLUO
I - RUNNING A/C BILL
i) Name of Contractor/Agency :
ii) Name of work :
iii) Sr. No. of this bill :
iv) No. and date of previous bill :
v) Reference to Agreement No. :
vi) Date of written order to commerce :
vii) Date of completion as per agreement :
Sr no. Item Description Unit Rate (Rs.) As per tender
Qty. Amount (Rs.)
1 2 3 4 5
Upto previous R/A Bill Upto date (Gross) Present Bill Remark
Qt. Amount (Rs.) Qty. Amount (Rs.) Qty. Amount (Rs.)
6 7 8 9
Note: 1) If part rate is allowed for any item, it should be
indicated with reasons for allowing such a rate.
--------------------------
2. If adhoc payment is made, it should be mentioned Net value since previous
specifically. bill
77
CONTRACTOR NLUO
II -ACCOUNT OF SECURED ADVANCE, IF ADMISSIBLE ON MATERIALS HELD
AT SITE BY THE CONTRACTOR
No. Item Quantity Unit Amount Remarks
1 2 3 4 5 7
Total value of materials at site
Secured Advance @ …………………….% of above value B
CERTIFIED (I) That the materials mentioned above have actually been brought by the
contractor to the site of the work and no advance on any quantity of any of this item is
outstanding on their security, (ii) that the materials are of imperishable nature and are all
required by the contractor for use in the work in connection with the items for which rates
of finished work have been agreed up on.
Dated signature of Site Engineer
NLUO Preparing the bill
Designation_____________
Dated signature of N.L.U.O‟s
Architects
-----------------------
--------------------------------
(Name of the Architects)
Dated signature of Contractor.
78
CONTRACTOR NLUO
CERTIFICATE
The measurements on the basis of which the above entries for the Running Bill No.____ were
made have been taken jointly on _________________________________________
and are recorded at pages________________to _____________________of measurement book
No.__________________.
_______________________ _____________________ _________________
Signature and date of Signature and date of Architect‟s Signature and date of
Contractor site engineer.
The work recorded in the above-mentioned measurements has been done at the site satisfactorily
as per tender drawings, conditions and specifications.
Architect/Consultant. N.L.U.O‟s Engineer
79
CONTRACTOR NLUO
PROFORMA OF UNDERTAKING IN CONNECTION WITH PAYMENT OF
ADVANCE ON MATERIALS BROUGHT BY THE CONTRACTOR TO THE SITE
The undertaking made this …………….day of ………….2011………………between the National Law
University ORISSA ,………………………………………and having its …………………Office at
……………………………………………………(hereinafter called the NLUO) of the one part and
………………………………..(Hereinafter called the contractors of the other part.)
The NLUO and the Contractors have entered into an Agreement date………………….hereinafter
called as the said agreement and in terms of Clause No……………………….of the conditions in the
agreement, the NLUO has agreed that the Contractors will be paid an advance of 75% of the cost of
non-perishable building materials brought by the Contractor to the site for consumption in the works at
the discretion of the NLUO.
The Contractors have applied to the NLUO that they be allowed advance on the security of materials
absolutely belonging to them and brought by them to the site of work. The NLUO has agreed to do so
on the terms and conditions hereinafter set out.
Now this letter of Undertaking witnesses that in consideration of the side agreement and in
consideration of the amount paid/payable to the Contractors by the NLUO and/or any further advances
as may be made to the contractors as aforesaid, the Contractors hereby agree with the NLUO and
undertake as under
i) The amount advanced by the NLUO to the Contractors as aforesaid and all or any further
sum or sums advanced as aforesaid shall be employed by the Contractors in or towards
expediting the execution of the said works and for no other purpose whatsoever
ii) That the materials which have been offered to and accepted by the NLUO as security are
absolutely the Contractor‟s own property and free from encumbrances of any kind and
the Contractor will not make any application for or receive a further advance on the
security of materials which are not absolutely his own property and free from
encumbrances of any kind and the Contractors indemnify the NLUO against all claims to
any materials in respect of which an advance has been made to them as aforesaid.
iii) That the materials on the security of which any further advance or advances may
hereafter be made as aforesaid (hereinafter called the said materials) shall be used by the
Contractors solely in the execution of the said works in accordance with the directions
of Vice Chancellor, NLUO of the NLUO and in accordance with the terms of the said
agreement.
v) That the contractors shall take at their own cost all the necessary and adequate
arrangement for the proper watch, safe custody and protection against all risks of the said
materials and that until used in construction as aforesaid. The said materials shall remain
at the site of the said works in the Contractor‟s custody and on their own responsibility
and shall at all times be open to Inspection to the
NLUO‟s Engineers or any officer authorized by the NLUO. In the event of the materials
or any part thereof being stolen destroyed or damaged, the Contractor will further
replace the same with other materials of like quality or repair and make good the same as
required by the NLUO.
80
CONTRACTOR NLUO
v) That the said materials shall not any account be removed from the site of the said works
except with the written permission of the Vice Chancellor, NLUO the NLUO.
vi) That the advances shall be repayable in full when or before the Contractors receive
payment from the NLUO of the price payable to them for the said works under the terms
and the provisions of the said agreement provided that if any intermediate payments are
made to the Contractors on account of work done, then on occasion of each such
payment, the NLUO will be at liberty to make as recovery from the Contractor‟s bill for
such payment by deducting there from the value of the said materials then actually used
in the construction and in respect of which recovery has not been made deviously, the
value for this purpose being determined in respect of each description of materials as the
rates at which the amounts of the advances made under these presents were calculated.
vii) That if the contractors shall at any time make any default in the performance or
observance in any respect of any of the terms and provisions of the said agreement or of
these presents, the total amount of advance or advances that may still be owing to the
NLUO, shall immediately, on the happening of such default, be repayable by the
Contractors to the NLUO together with interest thereon at 12% per annum from the date
or respective dates of such advance or advances to the date of repayment and with all
costs, charges, damages and expenses incurred by the NLUO in or for the recovery
thereof or the enforcement of this security or otherwise by reason of the default of the
Contractors and the contractors hereby covenant and agree with the NLUO to repay and
pay the same respectively to him accordingly.
viii) That the contractors hereby charge all the said materials with the repayment to the NLUO
of the sum or sums advanced as aforesaid and all costs, charges, damages and expenses
payable under these presents PROVIDED ALWAYS and it is hereby agreed and
declared that notwithstanding anything in the said agreement and without prejudice to
the powers contained therein if and whenever the covenant for payment and repayment
hereinabove contained shall become enforceable and the money owing shall not be p aid
in accordance therewith, the NLUO may at any time thereafter adopt all or any of the
following courses as he may deem best:
a) Seize and utilise the said materials or any part thereof in the completion of the
said works on behalf of the contractors in accordance with the provisions in that
behalf contained in the said agreement debiting the contractor with the actual cost of
such completion and the amount due in respect of advances under these presents and
crediting the Contractors with the value of work done as if he had carried it out in
accordance with the said agreement and at the rates thereby provided. If the balance
is against the Contractors, they are bound to pay the same to the NLUO on demand.
b) Remove and sell by public auction the seized materials or any part thereof and out of
the moneys arising from the sale, retain all the sums aforesaid repayable or payable
to the NLUO under these presents and pay over the surplus (if any) to the Contractor.
c) Deduct all or any part of the money owing out of the Security Deposits or any sum
due to the Contractor under the said agreements
ix) That except in the event of such default on the part of the contractors as aforesaid, no
interest shall be payable on the said advance.
x) That in the event on any conflict between the provisions of these presents and the said
agreement, the provisions of these presents shall prevail and in the event of any dispute
81
CONTRACTOR NLUO
or difference arising over the construction of effect of these presents the settlement of
which has not been herein before expressly provided for the same shall be referred to the
officer-in-charge, NLUO, whose decision shall be final and no appeal shall lie against
his decision before any court, arbitrator or authority.
xi) The provision of this undertaking shall be deemed to be supplemental to the said
agreement.
IN WITNESS WHEREOF the Contractors have set their hands to these presents the day and
year first hereinabove written.
Signed, sealed and delivered by the said contractors in the presence of
Witness: Signature
Name
Address
Witness: Signature
Name
Address
82
CONTRACTOR NLUO
IV. MEMORANDUM FOR PAYMENT
R. BILL No. _________________________
1. Total amount due since previous bill
(D) (A+B)* Rs.______________
2. P.V.A. on account of escalation in
price of steel, cement and other
materials and labour as detailed in
separate statements enclosed Rs._____________
3. DEDUCTIONS:
(i) Secured advance paid in the previous
R.A. bill Rs.______________
(ii) Retention money on value of works
as per accepted tenders : upto date
amount Rs.______________
Less : Already recovered (-) Rs.______________
Balance to be recovered Rs.______________ Rs.______________
(iii Mobilisation advance, if any
(a) Outstanding amount
(Principal + interest) as on date Rs.______________
(b) To be recovered in this bill Rs.______________
(iv) Any other departmental material cost
to be recovered as per contract, if
any Rs.______________
(v) Any other departmental service
charges to be recovered if any, as per
contract (water, power etc.) Enclose
statement Rs.______________
Total deduction as per contractor Rs.______________ (-) Rs.______________
Net amount payable as per contract (E-F) Rs.______________ (G)
(Rupees ……………………………………….) in words
The bill amounting to ……………………………………………… (both figures and words) has
been scrutinised by me after due test check of the measurement of works as required and is
recommended for payment.
Dated signature of N.L.U.O‟s Engineer
In charge of the project
83
CONTRACTOR NLUO
STATUTORY DEDUCTIONS:
1. Total amount due (E) Rs.______________
2. Less : Income Tax payable Rs.______________
NET PAYABLE : Rs.______________
The figure given in the Memorandum for Payment has been verified and the bill passed for
payment ………………………………………………………………………….. (words and
figures).
Date : …………………………..
Signature of NLUO Officer
*For A & B refer Running Bill.
84
CONTRACTOR NLUO
PROFORMA OF SITE ORDER BOOK
Name of the work ______________________________
Date of Commencement _________________________
Sr. Remarks/ Dated Initials Initials of the Action Dated Remarks of the
No. Instructions of of Site Contractor for taken initials of Architects
the Site Engineer/ having with date the Site PMC/NLUO
Engineer/ Architect received the Engineer Officials
Architect instructions
1. 2. 3. 4. 5. 6. 7.
85
CONTRACTOR NLUO
PROFORMA FOR APPLICATION BY CONTRACTOR
FOR EXTENSION OF TIME
1. Name of the Contractor
2. Name of the work as given in the agreement
3. Agreement WO
4. Tender amount
5. Date of commencement of work
6. Period allowed for completion of work
7. Date of completion as per agreement
8. Period for which extension of time has been given
Date Month Year
a) 1st extension vide N.L.U.O‟s
Letter No.
b) 2nd extension vide N.L.U.O‟s
Letter No.
c) 3rd extension vide N.L.U.O‟s
Letter No.
9. Reasons for which extensions have been previously given (copies of the previous
applications should be attached)
10. Period for which extension is applied for and the reasons thereof including hindrances,
time for extra work assigned, if any etc.
Signature of Contractor
86
CONTRACTOR NLUO
PROFORMA OF HINDERANCE REGISTER
Name of work : Date of state of work :
Name of contractor : Period of completion :
Agreement No. : Date of completion :
Sr. Nature of Date of Date of which Period of Signature Remarks
No. hindrance occurrence of hindrance was hindrance SE / PE
hindrance removed
1. 2. 3. 4. 5. 6. 7.
SE = Site Engineer/ NLUO
PE = Project Engineer (Architect/ PMC)
87
CONTRACTOR NLUO
TECHNICAL SPECIFICATION OF MATERIALS
1. Materials shall be of the approved quality best obtainable. A list of materials of approved
brand and manufacturer is indicated in the annexure. Testing of materials of approved
brand may have to be done at the discretion of Architect & NLUO.
In case, some reason or other materials are required to be obtained from any manufacturer
other than those listed, then prior approval from Architects will be necessary supported by
relevant test certificates qualifying the required standard. Further tests as directed by the
N.L.U.O's Engineer shall also be carried out by the Contractor at their own cost, if
required.
2. Sample of all materials shall be got approved by Employee/Architect before placing order
& the approved sample shall be carefully preserved in an appropriate manner at the site
office for verification from time to time.
3. For standard bought out item, the size manufactured by the firms listed shall prevail when
there is discrepancy in the size mentioned in the schedule without any financial
adjustment.
4. Materials shall be tested in any approved Testing laboratory conforming to the
requirements and frequency indicated in the list of "Mandatory Tests". The test certificate
in original shall be submitted to the Site Engineer and entire charges connected with
testing including charges for requested tests if ordered shall be borne by the Contractor.
5. It shall be obligatory for the Contractor to furnish certificate, from manufacturer or the
material supplier, that the work has been carried out by using their material and as per
their recommendations.
6. All materials supplied by the NLUO/ any other specialist firms shall be properly stored
and the Contractor shall be responsible for its safe custody until they are required on the
works and till the completion of work.
7. All equipment & facilities for carrying out field tests on materials shall be provided by the
Contractor without any extra cost .
8. EARTH FILLING:
8.1 shall be selected earth suitable for filling as approved by the Architect/NLUO and
preferable free from building rubbish or organic decomposed material. They shall be
obtained either from excavation or brought from outside, as specified in the schedule of
items.
Black Cotton soil shall not be used for filling.
8.2 CEMENT :
Cement shall comply in every respect with the requirements of the latest publication of
I.S. 269 / I.S.455. The use of cement other than ordinary Portland cement / Blast furnace
slag cement may be allowed with prior approval of Architect & Employee if not
mentioned in the approved list of materials. * (Not less than 43 grade of approved make)
The weight of cement shall be taken as 1440 kg per cum (90 Lbs / cft) cement shall be
measured by weight and in whole bags and each undisturbed and sealed 50 kg Bag being
considered equivalent to 35 liters (1.2cft.) in volume. Care should be taken to see that each
bag contains full quantity of cement. When part bag is required cement shall be taken by
weight or measured in measuring boxes.
No other make of cement but that approved by the N.L.U.O's Engineer/Architect will be
allowed on works. Test certificates to show that cement is fully complying the
specifications shall be submitted by the Contractor to the N.L.U.O's Engineer /
88
CONTRACTOR NLUO
Architect. Not withstanding this cement brought on site shall be retested in an approved
testing laboratory every 30 M.T. or part thereof to ensure quality of materials used. In case
manufactures test certificate is not submitted the frequency of test shall be reduced to 30
M.T. or part thereof Cement ordered for retesting shall not be used for any work pending
results of retest.
Cement shall be restored in order to prevent deterioration by dampness or intrusion of
foreign matters. It shall be stored in such a way as to allow the removal & used. Cement
deteriorated & / or clodded shall not be used on work but shall be removed at once from
the site. However, the N.L.U.O‟s Engineer/Architect whose decision in this regard shall be
final and binding shall determine slowing use of warehouse set cement. The site Engineer
at site will maintain cement register.
8.4 FINE AGGREGATE :
Sand shall be from natural source or crushed stone screenings, if allowed chemically inert,
clear, hard, durable and well graded and free from excessive dirterious materials. The silt
content shall be within 8%. If it excess washing shall be done in an approved manner to
bring it within allowable limit. Sand will be used as per relevant I.S. specification.
The fine aggregate shall be stacked carefully on a clean hard dry surface so that it will not
mixed up with deleterious foreign materials. If such a surface is not available a platform of
planks or corrugated torn sheets or brick floor or a thin layer of lean concrete shall be
prepared.
8.5 COARSE AGGREGATE:
shall consist of crushed or broken stone 95% of which shall be retained on 4.75mm IS test
Sieve. It shall be obtained from crushing Granite, Quartzite, Trap, Basalt or similar
approved stones. Coarse aggregate shall be chemically inert when mixed with cement and
shall be roughly cubical in shape and free from soft friable, thin laminated or flaky pieces.
8.6 STEEL REINFORCEMENT :
MILD STEEL BARS
Mild steel reinforcement bar shall conform to I.S. 226-1962 "Standard quality " or I.S.
432-1966 Grade. Other qualities of Steel shall not be accepted.
8.7 HIGH STRENGTH DEFORMED BARS :
Where of deformed high strength reinforcement bars are specified, the contractor use one
of the following :
a. "Tor steel" as per I.S. 1786-1956
b. For a total requirement of less than 10 Mt. Steel may be obtained from recognized
dealers with prior approval of Architect. It will be the sole responsibility of the
Contractor shall try to obtain test certificate from the manufacturers. Over and above
the Contractor at his own cost shall arrange to get materials tested from any
recognized govt. laboratory to ensure & satisfy the Architect/ Owner regarding
compliance of the materials to relevant Indian standard Codes. Sources of supply
once approved by the
89
CONTRACTOR NLUO
Architect/Owner shall not be changed without their prior consent. Tests to be
conducted as per list of mandatory tests.
8.8 BRICKS :
The Bricks shall be class designation of 75 kg/cm2 of regular and uniform size, shape and
color, uniformly well burnt throughout but not over burnt. They shall be free from cracks
or other flaws.
They shall show a fine grained, uniform homogenous and dense texture on facture and be
free from lumps of lime laminations, cracks, air holes, soluble salts causing efflorescence
or other defects which may in any way impair their strength, durability, appearance
usefulness for the purpose intended. They shall not have any part under burnt. They shall
not break even thrown on the ground on their flat face in a saturated condition from a
height of 600cm.
The size of brick shall (250mm x 125 x 75mm) or (230mm x 115mm x 65mm) only.
Tolerance on dimensions up to ( + or -) 8 % shall be permitted.
After immersion in water, absorption by weight shall not exceed 20 percent of the dry
weight of the brick when tested according to I.S. No -1077-1970.
The brick shall have a minimum average compressive strength of 75 kg/cm2 as specified
in the nomenclature of the item.
The bricks to be used for the work shall be approved by the Owner/ Architects before
hand.
8.9 WATER :
Water for mixing Cement/lime/ Surkhi mortar or concrete shall not be salty or brackish
and shall be clean, reasonable clean and free from objectionable quantities of slit traces of
oil, acid and injurious alkali, salts, organic matter and other deleterious materials which
will either weaken the mortar or concrete on cause efflorescence or attack the steel in
reinforced cement concrete water shall be obtained from sources approved by the
Architect portable water is generally considered satisfactory for mixing and curing
concrete, mortar, masonry etc. Where water other than Municipal source is used this shall
be tested in an approved testing laboratory to establish its suitability. All charges
connected herewith shall be borne by the Contractor.
8.10 TIMBER :
Unless otherwise specified, timber for carpentry / joinery works of all description shall be
Sal / Piasal or equivalent hard wood, seasoned naturally or artificially as indicated in
Schedule. These shall be free from knots, shakes, fissure, flaws, sub-cracks and other
defects to a reasonable extend. Architect's decision in this regard is final and binding. The
moisture content for timber will be used as per relevant I.S. specification normally should
not exceed for the following limits :-
i) Timber for frames : 12%
ii) Timber for Planking/Shutters etc. : 8%
In measuring cross-sectional dimensions of timber or the frames/ shutters styles, rails or a
panel members, tolerances up to 1.5mm shall be allowed for each planed surface.
All fully fabricated timber shall be seasoned at site of work for a period of not less than
two months to allow for any shrinkage that may take place unless sit kiln seasoned.
The decision regarding acceptance/ rejection of material on the basis of aforesaid norms
lies with the Architect/ Owner which is final and binding on the Contractor.
90
CONTRACTOR NLUO
8.11 FLUSH DOORS :
All flush doors shall be I.S.I. stamped (confirming to IS-2202, Pt-1) and obtained from
approved manufacturer as listed shall be solid core exterior grade unless otherwise
specified.
8.12 ALUMINIUM DOORS/WINDOWS :
Aluminum doors and windows shall be obtained from approved manufacturer. Aluminum
sections for fabricating frame work doors, windows, jallies, etc. shall be of extruded
sections conforming to I.S 1948, 1949 or latest edition or as per drawings or as
manufacturer by Indian Aluminum co. Ltd. or approved equivalent. The alloy used shall
conform to I.S designation H.E. 9 WP of I.S. 733.
8.13 FLOOR TILES :
Plain cement tiles, chequered tiles. mosaic tiles, terrazzo tiles shall be compacted by
mechanical vibrator and hydraulically pressed and shall be of choice shade & shall have
desired pattern of chip distribution. The size and thickness of tiles shall be as approved by
the N.L.U.O's Engineer. For neutral shade tiles, gray cement shall be used.
8.14 CERAMIC TILES :
White or colored Ceramic tiles shall be obtained from an approved manufacturer and shall
be flat an true to shape. The tiles shall be free from cracks, crazing, spots, chipped edges
and liners. The Glazing and color shall be uniform shade and unless otherwise specified
the tile shall be as per manufacturer's specification.
8.15 MARBLE :
Marble slabs for flooring, dado veneering etc shall be of the kinds specialized in the item
such as white of pink Makrana, Chittor black . Bhansalana black, jaisalmer baroda green;
atiaalka (pepsu ) gray etc. Marble from which the homogenous in texture. free from
cracks decay weathering and flaws .Before starting the work the contractor shall be get
the sample of marble slab approved by the architect and NLUO .
The Slabs shall be machine polished.
8.16 KOTA /GRANITE :
shall be of selected, qualified ,hard, sound, dense , homogenous texture ,free from cracks,
decay weathering and flaw stone slabs shall be approved by the Architect and NLUO.
They shall be machine polished where specified and shall conform to the required sizes .
Thickness shall be as specified item .
8.17 GLAZING :
Glass used for glazing shall be sheet glazier unless otherwise specified clear or obscured
as directed by the architect /NLUO of best approved quality ,free from flaws speck,
bubbles and shall be 2.9mm thick up to 0.6 x 0.60 m size it shall be 5.5mm thick unless
otherwise specified in the schedule of quantities.
91
CONTRACTOR NLUO
8.18 HDPE RAIN WATER PIPES :
Pipes and fitting as per IS-4984-1987 (latest edition)
8.19 PAINTS :
Distemper and cement primer, oil paint, enamel paint, plastic emulsion paint , anti-
corrosive primer , read lead water proof, cement paint shall be from an approved
manufacture as listed Ready mixed paint shall be from an approved a manufacture with
out any admixture shall be used expect for addition of thinner if recommended by the
manufacturer.
8.20 CEMENT ADMIXTURES :
Cement admixture are to be obtained from manufacture with the explicit approval of the
architect the use admixture contain calcium chloride, fluorides, nitrates and sulphates
is prohibited The architect's decision as regards use of admixture of admixture is final
and binding
8.21 HARDWARE FITING :
The hardware fitting iron or aluminum /brass shall be obtained from approved
manufacturer and invariable is ISI stamped the M.S. iron fitting are to be oxidized &
aluminum fittings anodized in natural color mat satin finish even if not otherwise
specified.
8.22 POLYSULPHIDE SEALANT :
Polysulphide sealant should be obtained from approved manufacture as listed .
8.23 MORTAR
Cement mortar to be prepared in accordance with IS:2250. It shall be made of cement
and sharp coarse sand and shall be made in small quantities so as to be used within 30
minutes. The cement and sand in the required proportion., and classification shall be first
mixed dry thoroughly and then water added and mixed to a sufficiently thick consistency
as required by the Engineer. No left over mortar shall be used. Mortar which has
partially set shall not be retempered by mixing additional material or water.
The unit of measurement for cement shall be of a bag of cement weighing 50 Kg. and
shall be taken as 0.035 cu.m. Other ingredients in specified proportion shall be measured
in boxes of 25 x 35 x 40 cm size. Sand shall be measured on the basis of dry volume. In
case of damp sand, its quantities shall be increased suitably to allow for bulkage
8.24 SAND
This shall be dry coarse sand of approved quality conforming to IS:383. 100% of the
sand shall pass through I.S. sieve No. 240 and not more than 15% to 35% through Sieve
No.30. Sand shall have a fineness modulus between 2.1 to 2. Sand shall be clean angular
free from dust, clay or any other impurities. Percentage of clay or total impurities shall
not be more than 5% by weight.
Sand for use in masonry mortar shall conform to IS:2116 including grading. Sand for
use in plaster shall conform to IS:1542 including grading
92
CONTRACTOR NLUO
SECTION - I
EARTH WORK
1.1 GENERAL :
The excavation will generally refer to open excavation of foundation area wet or dry in all
sorts of soils at any depth, unless otherwise specified except hard rocks for which separate
provisions are made.
1.2 EXAMINE THE SITE :
The Contractor shall visit and ascertain the nature of the ground to be excavated and the
work to be done and shall accept all responsibility for the cost of the work involved.
1.3 SETTING OUT :
The Contractor shall clear the entire site of jungles, bushes, grass, vegetation growth &
trees & generally level the site and set out the center line of the building or other involved
works & get the same approved from Owner/ Architect. It shall be the responsibility of the
Contractor to install substantial references marks, bench marks etc. and maintain them as
long as required by the Owner /Architect. The Contractor shall assume full responsibility
for proper setting out, alignment, elevation and dimension of each and all parts of the
works.
1.4 GROUND LEVEL AND SITE LEVEL :
Before starting the excavation the existing ground level of the entire plot shall be taken by
the Contractor in consultation with the Owner/Architect and a proper record of these
levels kept, which the Contractor & the NLUO/Architect shall jointly sign.
1.5 Excavation
Excavation shall be carried out in any type of soil met at the site for items and to the
lines, levels and contours as directed by the Engineer
Excavated materials shall not be deposited within 1.5M from edge of the excavation.
Suitable type of shoring and strutting, wherever necessary, shall be provided to avoid
any collapse of earth or cutting in slope as per site requirement and as directed by the
Engineer.
Pits shall not be excavated to final founding level unless concreting work is imminent.
Last 15 cms. shall be excavated prior to providing, blinding layer with lean concrete
(M5, unless otherwise specified in drawing). The contractor shall not undertake any
concreting in foundation until the excavated pit is approved by the Engineer.
If any bottom of excavation is left exposed and has become deleteriously affected by
atmosphere or water, it shall be dewatered and excavated to sound base, and shall be
filled up to the required level with lean concrete of grade M-15 at the cost of Contractor.
Similarly excess excavation than the required level also to be filled up with lean concrete
at the cost of Contractor.
Any obstacle, encountered during excavation shall be reported to the Engineer and shall
be dealt as directed. Removal of buried piping or cables shall not be done without prior
permission of Engineer and contractor shall provide all measures to protect such lines.
Cost of such protective measures are deemed to have been included in the unit rates for
excavation.
93
CONTRACTOR NLUO
The contractor shall take adequate protective measures to ensure that the excavation
operations do not damage the adjoining structures or dislocate underground services.
Excavated material shall be deposited within radius of 50M or as specified in the item of
work. Selected excavated material, on approval by Engineer shall be back-filled in layers
of maximum 15 cms. Watering, compacting shall be done as specified in method of
backfilling.
The Contractor shall arrange to cut or transplant any trees coming in the alignment of the
excavation or other work after obtaining prior approval and complying with all
requirements of the concerned authority and remove the same wherever required. Unless
otherwise stated no separate payment shall be made for the same.
The Contractor shall provide suitable drainage arrangements to prevent surface water
entering foundation pits. The contractor shall engage pumps or other approved means to
keep excavation free of water.
In cases, where during excavation, side slips occur, for reasons not attributable to the
Contractor or in cases of pumping out water accumulated due to unforeseen reasons like
watermains / drains broken accidentally by other agencies, springs etc., suitable payment
shall be made separately at the rates mutually agreed.
Lowering of water table by well point system or other such special measures shall be
paid separately against relevant item in the B.O.Q. or by mutual agreement.
1.6 SOIL CLASSIFICATION FOR PURPOSE OF MEASUREMENT AND
PAYMENT
All materials to be excavated shall be classified by Engineer, into one of the following
classes and shall be paid for at the rate approved for that particular class of material. No
distinction shall be made whether the material is dry, moist or wet. The decision of
Engineer regarding the classification of the material shall be final and binding on
Contractor and not be a subject matter of any appeal or arbitration.
Any earth work shall be classified under any of the following categories; in accordance
with IS-1200 part I.
a. Ordinary soils
These shall include all kinds of soils containing kankar, sand, silt, hard and soft
murrum and/or shingle, gravel, clay, loam, peat, ash, shale, etc.. which can
generally be excavated by spade, pick axes and shovel, and which is not
classified under "soft and decomposed" and "hard rock" defined below.
This shall also include embedded rock, rubble not longer than 500 mm in one
direction and not more than 300 mm in the other two directions. Removal of such
ordinary soils by mechanical excavators, shovels, draglines etc. shall be payable
at the rate for 'Ordinary soils'.
b. Soft and Decomposed Rock
This shall include rock, boulders, slag, chalk, slate, hard mieacschist, laterite and
all other materials which in the opinion of Engineer is rock, but does not need
blasting and could be removed with picks, hammer, crow bars, wedges and
pneumatic breaking equipment. The mere fact that Contractor resorts to blasting
for reasons of his own, shall not qualify for classification under 'hard rock'. This
shall also include excavation in macadam and tarred roads and pavements. This
94
CONTRACTOR NLUO
shall also include rock boulders longer than 500 mm in one direction and not
more than 500 mm in any one of the other two directions.
Hard Rock
This shall include all rock occurring in large continuous masses, which cannot be
removed except by blasting for loosening it. Hardened varieties of rock with or
without veins and secondary minerals, which, in the opinion of engineer require
blasting shall be considered as hard rock. Boulders of rock occurring in such
sizes and not classified under (a) and (b) above shall also be classified as hard
rock. This will also include reinforced cement concrete (reinforcement to be cut
through, but not separated from concrete).
1.6 EXCAVATION AND PREPARATION OF FOUNDATION
FOR CONCRETE, OTHER HARD ROCK :
Excavation shall include removal of all materials of whatever nature, including moorum,
soft rock, boulders, old foundations, concrete, asphalt or paved surface etc. at all depths &
whether wet for dry necessary the construction of foundation & sub-structure including
mass excavation for under ground reservoir, cess pits, septic tanks etc. where applicable
exactly in accordance with lines, levels, grades and curves shown in the drawings or as
directed by the Owner/Architect, he shall at his own expenses till the extra depth or width
in cement concrete in proportion as directed by the Owner/Architect but in no case with
concrete of mix leaner than (1:4:8) cement concrete.
The Contractor shall report to the Owner/Architect when the excavations are ready to
receive concrete. No concrete shall be placed in foundations until the contractor has
obtained Owner/Architect approval. In case, the excavation is done through different strata
of soil and if the same is payable as per provision in the Schedule of Quantities the
contractor shall get the dimensions of the strata decided by the Owner/Architect for
payment. if no specific provisions is made in the Schedule of Quantities it will be
presumed that excavation shall be in all types of strata & the contractor's rate shall cover
for the same which are treated as a single entity.
After the excavation is passed by the Owner / Architect & before laying the concrete, the
Contractor shall get the depth & dimensions of excavation levels, and nature of strata (As
applicable as per Schedule of Quantities) like hard rock, soft rock etc.) measurement
recorded from the Owner/Architect.
1.7 EXCAVATION IN HARD ROCK :
Rock which is in solid beds, which can only be removed whether by blasting or by
wedging or chiseling shall be treated as hard rock. A boulder or detached rock measuring
one cubic meter or more shall also be treated as hard rock if the same cannot be removed
with blasting. wedging or chiseling.
Where hard rock is met with and blasting operations as considered necessary, the
Contractor shall intimate about the same to the Architect.
The Contractor shall obtain license from District Public Authorities for carrying out
blasting work as well as for obtaining, transporting and steering explosives as per
“explosives Rules 1940” or amended. He shall purchase the explosives, fuses detonators,
etc., only from a licensed dealer. He shall maintain the account of explosive etc. purchase
95
CONTRACTOR NLUO
and used by him. He shall be responsible for safe custody and a proper accounting of
explosive materials. The Architect shall have access to check to store of explosives and
accounts thereof .
Blasting shall normally be done with gun power, Dynamite, Gelatin or any other high
explosive shall only be used in special cases with written permission of the Architect and
District/Public authorities concerned under the "Explosive Rules"
Blasting operations shall be carried out under supervision of a responsible representative
of the Contractor during hours to be approved in writing by the Architect/District
Authorities. The representative shall be conversant with the rules of blasting .
Proper precautions for safety of persons shall be taken red flag shall be prominently
displayed around the area to be blasted and all people work except those actually light
fuses shall be withdrawn to a safe distance of not less than 10 meters from the blast.
Blasting shall not be done within 100 meters of an existing masonry or any other kind of
structure unless special precautions are taken by heavy blanketing.
Where blasting is not practicable or prohibited, excavation shall be done by wedging or
chiseling and it shall be restricted to the quantity required to enable the necessary
foundations, etc., to be put in. In case the dimension of trenches, exceed those shown in
drawings or as directed by dimension of trenches, exceed those shown in drawings or as
directed by the Architect, the excess quantity shall not be paid for. The item also covers
bailing out sub-solid or rain water including pumping at any stage of the work, shoring,
strutting etc.
1.8 SHORING :
The sides of the excavation, if required, should be protected by shoring in such a way as is
necessary to secure them from failing in and the shoring shall be maintained in position a
long as necessary. The Contractor shall be responsible for the proper design of the shoring
to hold the sides of the excavation in position and ensuring safety and injury to persons
and properties etc. The shoring shall be removed as directed after the items for which it is
required are completed
1.9 PROTECTION:
If instructed by the Owner/Architect all foundation pits and similar excavations shall be
strong fenced and marked with red lights at bring in charge of watchman to avoid
accidents, adequate protective measures shall be taken to see that the excavation does not
affect or damage adjoining structures. All measures required for the safety or the
excavations, the Contractor at his own cost shall take the people working in and near the
foundation trenches and people in the vicinity. The Contractor will be entirely responsible
for any injury or damage to property caused by his negligence or accident due to his
constructional operations.
1.10 STACKING OF EXCAVATED MATERIALS :
All materials excavated will remain to property of the Owner. The excavated materials at
first instance shall be stored as directed by the Architect/Owner and stacked appropriately
by the sides of trenches in conformity with standard safety codes before they are disposed
off and leveled within the site at locations directed by the Architect/Owner. Materials
suitable and useful for back filling or leveling of the plot or other use shall be stacked in
convenient places in such a way so as not to obstruct free movement of man, animals
96
CONTRACTOR NLUO
encroach on the area required for constructional purposes. The cost on account of disposal
within the site will not be additionally paid for.
1.10 BACKFILLING :
All shoring and form work shall be removed after their necessity ceases & trash of any
sorts shall be cleaned out from the excavation shall be refilled to the original surface with
approved excavated materials in a layers 25.00cm, in thickness watered & rammed with
iron and wooden rammers weighing 7-8 kg., with a base of 20cm.square or 20cm.
diameter. The filling shall be done after concrete or masonry is fully set and done in such a
way as not to cause undue thrust on any part of the structure where suitable excavated
materials is to be used for refilling it shall be brought from the place where it is
temporarily stacked and used in refilling.
No excavation of foundation shall be filled or covered up until all measurements of
excavations, masonry concrete and other works below ground level are jointly recorded.
Black cotton soil shall not be used for backfilling or in plinth filling.
1.11 DEWATERING :
Rate for excavation shall include bailing or pumping out water which may accumulate in
the excavation during the progress of work whether from seepage , springs, rain or any
other means. Pumping out water shall be done in such approved manner as to preclude the
possibility of any damage to the foundation trench concrete or masonry or any damage to
the foundation trench concrete or masonry or any adjacent structure. When water is met in
foundation trenches of in tank excavations, when water is met in foundation trenches of in
tank excavations, pumping out water shall be from auxiliary pit of adequate size dug
slightly outside the building excavations. The depth of auxiliary pit shall be refilled with
approved excavated materials after the dewatering is over.
The excavation shall be kept free from water:
a. During inspection and measurement.
b. When concrete and/or masonry are in progress and till they come above the natural
water level and
c. Till the Owner/Architect consider that the concrete mortar is sufficiently set.
1.12 SURPULS EXCAVATED MATERIALS :
All excavated materials certified as surplus and not useful shall be removed by the
Contractor confirming to local civic regulations from the site in an approved manner at
locations to be arrange made by him and shall be paid as a separate item as in schedule of
quantities.
The Contractor shall only undertake the item of removal of surplus excavated materials
when specific instruction in this regard has been obtained from the NLUO/ Architect.
97
CONTRACTOR NLUO
SECTION -II
PLAIN AND REINFORCED CEMENT CONCRETE
Plain and reinforced cement concrete :
The provisions for Indian Standards for Plain and Reinforced concrete, mild steel, hot
rolled deformed bars, cold twisted bars etc. to be used reinforcement, cement of different
qualities, coarse and fine aggregates, water to be used in concrete and other Indian
Standards specifications should be generally applicable except where they are varied by
the requirements of these specifications. It shall be the intent o f these specifications to
ensure that all concrete placed at various locations of the job should be durable, should
wear and practically impervious to water. It should free from defects like cracking, honey
combing etc.
The Contractor under the Supervision of an Engineer shall carry out all concrete work.
I.S. code under reference should mean the latest code together with amendments in
circulations at the time of awards of the contract.
1.1 INGREDIENTS TO BE USED IN CONCRETE AND REINFORCED CONCRETE
WORK :
Ingredients to be used in concrete should confirm to the specifications as indicated under
"Technical Specification for materials" given earlier.
As regards admixture, this may be used with prior approval of PMC/ Consultant.
1.2 MIX PROPORTION : (Normal Volumetric mix)
The mix proportions shall be selected to ensure that workability of the fresh concrete is
suitable for the conditions of handling and placing, so that after compaction it surrounds
all reinforcements and completely fills the form .
The determination of the proportions of cement aggregates and water to attain the required
strength shall be made as follows for volumetric mix :-
1.2.1 TABLE - "A" :
GRADES OF CONCRETE : Compressive strength of 15cm Cube.
Kg/Cm2 Kg/cm2
7 day 28days
1:1:2 210 315
1:1.5:3 175 265
1:2:4: 140 210
98
CONTRACTOR NLUO
1.2.2. VOLUMETRIC MIX CONCRETE :
Volumetric mix concrete may be used for concrete of grades 1:1:2, 1:1.5:3, 1:2:4. The
Proportion of materials for volumetric mix concrete shall be in accordance with Table "B".
The Proportions of fine to coarse aggregates should be adjusted from upon limit to lower
limit progressively as the grading of the fine aggregates become finer and the maximum
size of coarse aggregates become larger. Graded coarse aggregate shall be used .
The cement content in the mix specified in Table "B" of any volumetric mix be
proportionately increased to overcome the difficulties of placement & compaction, so that
the water cement ratio as specified is not changed.
In the case of vibrated concrete, the limit specified may be suitable reduced to avoid
segregation.
The quantity of water used in the reinforced concrete work should be sufficient, but not
more than sufficient to produce a dense concrete of adequate workability for it purpose,
which will surround and properly grip all the reinforcement. Workability of concrete
should be controlled by maintaining a water content that is found to give a concrete which
is just sufficiently wet to be placed and compacted without difficulty with the means
available.
TABLE "B" PROPORTIONS FOR VOLUMATRIC MIX CONCRETE :
Grade of Total quantity of dry Proportion of Quantity
Concrete Aggregate by mass per Fine aggregate water per 100kg of
cement. to coarse 100kg of cement to
be aggregate(By volume) (Maximum)
taken as the sum of litres.
the individual masses
of fine and Coarse
aggregate (in cum.).
1 2 3 4
1:5:10 0.70 Generally 1:2 120
but subjected to an upper
of 1:1.5 and lower limit
1:2.5 on approval of site
Engineer/Architect.
1:4:8 0.53 90
1:3:6 0.40 68
1:2:4 0.24 64
1:1.5:3 0.22 60
99
CONTRACTOR NLUO
1.3 MIXING :
Concrete shall be mixed in a mechanical mixer. The mixer should comply with I.S. 1791.
The mixing shall be continue until there is a uniform in color and consistency. If there is a
segregation after unloading from the mixer the concrete should be one and half to two
minutes generally. In exceptional circumstances such a mechanical breakdown of mixer,
or when the quantity of concrete is very small, hand mixing may be permitted, subject to
adding 10% extra cement. When hand mixing is permitted, it should be carried out on a
water tight platform and care shall be taken to ensure that mixing is continued until the
concrete is uniform in color and consistency.
1.3.1 Workability of concrete should be controlled by direct measurement of water content and
it should be checked at frequent intervals, of nominal mix workability measured by slump
test may have the values given in Table D.
TABLE "D"
Sl.No Type of work When Vibrated
1. Mass concrete in R.C.C. 2.5 cms. (1")
foundation footings retaining
walls and road slabs.
2. Beams, slabs, columns 2.5 cms to 5 cms
with simple reinforce (1" to 2")
cement
3. Tees section with 5 cms to 10 cms
congested reinforcement
Note : should conditions governing slump and workability change pointing to advisability of
increased slumps, this shall be done by decreasing the amount of aggregate and not by
increasing the amount of water.
1.4
1.4.1 TRASPORTING :
Concrete shall be transported from the mixer to the form work as rapidly as possible by
methods which prevent the segregation of loss of any of the ingredient and maintain the
required workability in no case more than 30 minutes shall elapse between mixing and
consolidation in its position. During hot and cold weather ,concrete shall be transporting in
deep containers other suitable method to reduce the loss of water by evaporation in hot
weather and hat loss in cold weather may also be adopted.
1.4.2 PLACING :
The concrete shall be deposited as nearly as practicable in its final position to avoid re-
handling The concrete shall be placed and compacted before setting. Commences and should
not be subsequently disturbed method of placing should not be to preclude segregation care
should be taken to avoid displacement of reinforcement or movement of form work .Concrete
shall not be drooped into position from a height greater than 2.0 meter
100
CONTRACTOR NLUO
1.4.3 COMPACTION :
Concrete should be thoroughly compacted and fully worked around the reinforcement
embedded fixtures into corners of the form work mechanical vibrators should general be used
as per I.S –2505, I.S- 2514 and I.S-4656 over vibration or vibration of very wet mixes is
harmful and should be avoid under vibration is harm full .
When the vibration is to be applied external the design of form work and the disposition of
vibrators should receive special consideration to ensure efficient compaction and surface
blemishes .
Beams and columns shall be vibrated using immersion vibrators then section like walls of
water tanks, chajjas aprons etc. should be vibrated using surface vibrators it is better to vibrate
in smaller intervals for short period of time rather than at wider intervals for longer periods of
time the vibrator shall be used only to aid compaction and not push concrete laterally in the
forms .
1.4.4 CONSTRUCTION JOINT :
Construction joints shall in general conform to the relevant clauses of IS:456.
When the placing of concrete is interrupted and a construction joint is formed, provision shall be
made for interlocking with the succeeding layer by the embedment or saturated wooden blocks
or strips, smoothened on four sides to facilitate their removal. Prior to the next pour the wooden
pieces shall be loosened and removed in such a manner as to avoid damage to the concrete.
Such construction joints, if the contractor feels are necessary, shall be approved by the Engineer
and shall be so located and formed as to least impair the strength and the appearance of the
structure.
They shall be made in the positions as specified or as approved. Such joints shall be truly
vertical or horizontal as the case may be except that in an inclined or curved member the joints
shall be strictly at right angles to the axis of the member.
Construction joints shall be rebated to an approved profile and an approved water stop shall be
placed in the joints when specified.
Construction joints shall be made horizontally in the foundations and 75 mm below the lowest
beams soffit at the head of columns. Concrete in the ribs and slab of small tee and other beams
shall be placed in one operation but for large beams concrete in the rib upto a level 25mm below
the slab, soffit shall be placed first. Concrete in haunches or splays on beams.
or braces and concrete in the head of adjoining position of the column shall be placed at the
same time and at junction of walls and slabs shall be placed at the same time as that in the slab.
Construction joints in slab and beams shall be located at one third span and keyed and dowelled
as specified.
1.4.4A. Cold Joint
An advancing face of a concrete pour, which could not be covered by fresh concrete before
expiry of initial setting time (due to an unscheduled stoppage or delay on account of breakdown
in plant, inclement weather, low rate of placement or any other reason), is called a cold joint.
The Contractor should always remain vigilant to avoid cold joints.
If, however, a cold joint is formed due to unavoidable reasons, the following procedure shall be
adopted for treating it:-
101
CONTRACTOR NLUO
a) If concrete is so green that it can be removed manually and if vibrators can
penetrate the surface without much effort, fresh concrete can be placed directly
against the old surface. The old concrete should be covered by fresh concrete as
quickly as possible and the joint thoroughly and systematically vibrated.
b) In case concrete has hardened a bit more than (a) but can still be easily removed by a
light hand pick, the surface will be raked thoroughly and the loose concrete
removed completely without disturbing the rest of the concrete in depth. A rich mortar
layer 12 mm in thickness, will be placed on the cold joint fresh concrete shall be
placed on the mortar layer and the joint will be thoroughly and systematically
vibrated penetrating the vibrator deep into the old layer of concrete.
c) In case the concrete at the joint has become so stiff that it cannot be remoulded and
mortar or slurry does not rise in spite of extensive vibration, the joint will be left to
harden for at least 12-24 hrs. It will then be treated as a regular construction joint,
after cutting the concrete to required shape and preparing the surface.
1.4.5 PROTRECTION OF CONCRETE & CURING :
Newly placed concrete shall be protect by approved means from rain, sun and dries, winds.
Exposed faces of concrete shall kept continuously in a damp or wet conditional by ponding or
by covering with a layer of wet sacking canvas hessian or similar absorbent material and kept
constantly wet for at least 10 to 15 days (10 days in winter or concrete mere spring of water
vertical surface shall not be allowed approved curing compounds may be used in lieu of moist
curing with the permission of the Architect /Consultant. Such compound shall be applied of all
exposed surface of the concrete as soon as possible after the concrete placed below ground
shall be protected from failing earth during and after placing .Approved means shall be
taken to protect immature concrete from damage by debris excessive loading, vibration,
abrasion delectation grounds water mixing with earth or other material floatation and other
influence that may in pair the strength and durability of concrete horizontal surface that may
impair the strength and durability of concrete means of bund
1.4.6 Precast Concrete
1.4.6.1 All provisions, not specifically excluded and not in conflict with provisions of Section
2: Concrete and Formwork, Section: 4 Reinforcement and Section 7: Structural
Steelwork shall apply to precast concrete.
1.4.6.2 All precast units shall be cast on suitable bed or platform with firm foundation and
free from wind. Contractor shall be responsible for the accuracy of the level or
shape of the bed or platform.
1.4.6.3 Embedments
Contractor shall not do concreting unless Electrical conduits, pipes, fixtures etc.
wherever required, are laid by the concerned agency. Embedded items shall be placed
and maintained in correct position while concreting. Embedded items shall be properly
anchored to develop required strength.
102
CONTRACTOR NLUO
1.4.6.4 Striking Forms
Side shutters shall not be struck in less than 16 hours after depositing concrete and no
precast unit shall be lifted until the concrete reaches a strength of at least twice the stress
to which the concrete may be subjected to at the time of lifting.
1.4.6.5 Curing
All precast work shall be protected from the direct rays of the sun for at least 7 days after
casting and during that period each unit shall be kept constantly watered or preferably
completed immersed in water if the size of the unit so permits.
1.4.6.6 Expansion and Isolation Joints
Expansion and isolation joints in concrete structures shall be provided at specific places
as per details indicated on the drawings. The materials and types of joints shall be as
specified herein after, if not, otherwise mentioned in the drawings.
In case of liquid retaining structures, additional precautions shall be taken to prevent
leakage of liquids as may be specified on the drawings or as directed by the Engineer.
All materials are to be procured from reliable manufactures and must have the approval
of the Engineer. Where it is the responsibility of the Contractor to supply the material,
the Engineer may demand test certificates for the materials and/or instruct the Contractor
to get them tested in an approved laboratory free of cost to the Owner. Joints shall be
formed true to line, level, shape, dimension and quality as per drawings and
specifications.
Prior approval of the method of forming the joints should be obtained from the Engineer
before starting the work.
1.4.6.7 Bitumen Board/Expanded Polystyrene Board.
Bitumen impregnated fibre board of approved manufacturer as per IS:1838 may be used
as fillers for expansion joints. It must be durable and waterproof. It shall be compressible
and possess a high degree of rebound. The dimensions of the board should be equal to
that of the joint being formed. It should, preferably be manufactured in one piece,
matching the dimension of the joint and not prepared by cutting to size smaller pieces
from larger boards at site. At the exposed end, the joint shall be sealed with approved
sealing compound to a depth of atleast 25mm after application of an approved primer.
The sealing compound and the primer shall be applied as specified by the manufacturer.
103
CONTRACTOR NLUO
1.4.6.8 Metal Sealing Strips / water stops
Metal sealing strips shall be either G.I, Aluminium or Copper and formed. straight, U shaped, Z
shaped or any other shape and of thickness as indicated in the drawing and schedule of items
and/or as instructed by the Engineer.
The transverse joints will be gas welded using brass rods and approved flux and will be tested
by an approved method to establish that it is leakproof, longer lap lengths and different method of
brazing which will render it leakproof, will be adopted by the contractor without any additional
cost to the Owner.
The edges shall be neatly crimped and bent to ensure proper bond with the concrete.
a) G.I Strips
G.I strip shall be minimum 1.5mm thick and 150 mm in width unless specified otherwise. The
standard of Galvanizing shall be as per relevant India Standards for heavy duty work. At the
joints, the overlapping should be for a minimum length of 50mm.
b) Aluminium strips shall be minimum 18 SWG thick and 300 mm wide unless specified
otherwise and shall conform to IS:737 of 19000 grade or 31000 grade (Designation as per
IS:6051). A minimum lap of 50mm length is required at the joints.
1.4.6.9 Non-metallic Sealing Strips / water stops
These will be normally in rubber or P.V.C can be of shape having any combination of the
following features:-
a) Plain
b) Central bulb
c) Dumb-bell or flattened ends
d) Ribbed and Corrugated Wings
e) V shaped
As these types of seals can be easily handled in very large lengths unlike metal strips, transverse
joints will be allowed only under unavoidable circumstances and with the specific approval of the
Engineer. The method of forming these joints, laps etc. shall be as specified by the Manufacturer
and/or as approved by the Engineer taking particular care to match the central bulbs and the
edges accurately.
104
CONTRACTOR NLUO
1.4.6.10 Installation & Jointing Techniques of non metallic sealing strips.
One of the main advantages of PVC water-stops is that they can be installed very easily.
The jointing can be carried out by simple heat fusion/welding process. The installation
consists of embedding one half of he water-stop across its width in concrete leaving the
second half open. After completion of the first half, the concrete would be poured and
the second half would also be embedded leaving the centre bulb free for expansion and
contraction.
It is important that during pouring of concrete the water-stops should not be deformed
due to impact. The concrete should be properly vibrated so that it develops intimate
contact with the water-stops Care should be taken so as not to reduce effective cross
section of the water-stops.
It is necessary that PVC water-stops are placed near the centre of the concrete walls.
During installation, PVC water-stops are often required to be jointed. there are
essentially two types of joints :
1) Straight Joints
2) Mitred Joints
Straight joints are very simple and can easily be carried out at the site.
Fabrication of PVC water-stops can be carried out by means of simple tools. they are:
1. Hand saw or sharp knife for cutting.
2. Heating source like blow lamp or any other means.
3. A metal strip plate of suitable width and about 500 - 600 mm length with simple
holding device like a wooden handle.
4. Metal or wooden templates with suitable marking/grooves for 45 Deg.C and 90
deg.C angle cuttings.
The following jointing method is recommended :
1. Water-stops are cut by means of cutting device. Clean cuts provide the best
results.
2. The metal strip is heated to about 200 Deg.C which would be adequate to melt
the water-stops material. The strip should not be overheated so as to prevent
charring of PVC material.
105
CONTRACTOR NLUO
3. Two ends of PVC water-stops to be joined are pressed uniformly against the hot metal
strip. When sufficient fusing of PVC is attained, the metal strip removed and both the
ends are pressed together. It is necessary to ensure that the entire cross section is
uniformly heated and fused. It also essential to attain alignments of the complete cross
section and particularly of centre bulbs both the ends are well pressed until the joint
cools down to ambient temperature.
4. The metal strip should be cleaned by means of wire brush and cotton waste before the
next welding is carried out
1.5 FACILITES FOR PREPRATION AND TESTING OF AT SITE :
In order to exercise the required degree of consultant control over the concrete material and
their preparation the contactor is expected to set up and maintain at his own expense a testing
laboratory at site. He shall apparatus required for sensitive testing of concrete materials and
in particulars he is to have the following equipment in the site laboratory :-
i. concrete testing machine of capacity 60t/100t
ii. A set of standard sieves and sieves vibrator
iii. Measuring cylinder adequate number of cubes and cylinder moulds and slump
cones.
iv vibrating table
v. weight balance
vi. weighing balance.
vii. oven and other apparatus for drying aggregate
vii. Vicat's apparatus.
viii. Curing tanks for cubes
1.6 SAMPLES, TESTING AND ACCPETANCE OF CONCRETE :
Samples from fresh concrete shall be taken as per I.S.1199 and cubes shall be made cured
and tested at 7 days and 28 days in accordance with IS- 516.
Test shall be conducted for compressive strength on 15 cm x 15cm x15cm cubes of
concrete for concrete .companion specimen shall be cast from a signal batch of
concrete & shall be of the same age at the same time of testing ,in all be compressive
strength specified in table alone be the criteria for accepting for acceptance or rejection
of the concrete.
1.6.1 Six test specimen shall be made from testing three at 7days and three at 28 days the
specimen shall be tested as per I.S 516 the samples tested at its laboratory generally but
may be tested in any other test house /laboratory of Govt recognized institute also.
1.6.2 Concrete of each grade shall be assessed separately and shall be assessed daily for
compliance concrete is liable to be rejected if it is porous or honey -combed .its placing
has been interrupted with out providing a proper construction joint the reinforcement
has been displaced beyond the tolerance specified or construction tolerance have not
been met However ,the hardened may be accepted after carrying out suitable remedial
measure to minimum to the satisfaction of the Engineer -in charge.
1.6.3 If nominal mix concrete made in accordance with the aggregate cement prop. given for a
particular grade does not yield specified strength , such concrete shall be classified to
106
CONTRACTOR NLUO
nearest to the appropriate lower grade .Nominal mix concrete proportioned for a given
grade shall not lower be placed in higher grade than the minimum specified.
1.6.4 If the deficiency in the opinion of the Architect /consultant is such as to necessitate
removal of the concrete from the structure. Then on being so directed by the Architect
/NLUO the contractor at his own expense shall remove and replace by the concrete of
specified strength.
1.6.5 However when the strength is so deficient as to call for removal, Architect /NLUO before
ordering removal provided the contractor agree ,may direct for "load tests" or standard
tests which shall be carried out by the contractor at his own cost in the manner as will be
directed by the Architect /consultant and if the result is such that on all consideration the
can be retained then it may be accept at adequate.
STANDARD OF ACCEPTANCE :
Seven days test :
The average compressive strength of the three specimens tested at seven days shall satisfy
the specified strengths given in Table A, for the appropriate mix. As a guidance the
difference between the maximum and the minimum strength of the three specimens shall
not exceed 15% of the average strength. In case seven days result is not satisfactory all
further work structurally interlinked with the concrete represented by the samples shall
be stopped unless otherwise decided by Engineer.
Twenty eight days test :
Acceptance criteria of twenty eight days shall be as follows:
a) If the average compressive strength of three cubes is more than the compressive
strength indicated in Table A, the concrete shall be accepted at full rates.
b) If the average compressive strength of three cubes is less than the specified but not
less than 85% of the specified strength. the concrete may be accepted at reduced
rate or prorate basis up to 80% of original rate of items.
c) If the average compressive strength of three cubes is less than 85% of the specified
strength, Architect/site Engineer shall reject and get dismantled and defective portion
of the work represented by the sample along with the structurally connected work
as considered necessary at the risk and cost of the Contractor.
In case of (b) and (c) above , Architect/ Site Engineer, If he so decides may order the
additional tests like fore test, ultrasonic test, rebound hammer test, load test of structure of
part of structure etc. to be carried out. All the charges in connection with these additional
tests shall be borne by the contractor if on the basis of these additional tests the
Architect/site Engineer is satisfied about he structural adequacy of the concrete, he may
accept the work at reduced rates.
CONCRETE ORDERED TO BE DISMANTLED
Where the Architect / Site Engineer does not accept the poor or defective concrete the
contractor at his expense will dismantle the portion of structure and reconstruct the same
to the Architect / Site Engineer's satisfaction. Concrete thus dismantled will not be measured
and paid for . The additional work if and required to be carried out for re-concreting. shall
be to the contractor's account.
107
CONTRACTOR NLUO
QUANTITY OF DEFECTIVE CONCRETE REPRESENTED BY CUBES
In all cases of defective concrete as revealed by works test cubes strength failing below
the specified strength. the quantity of concrete thus affected and represented by the cubes
shall be decided by the Architect/Site Engineer whose decision shall be final and binding
on the contractor.
HONEY COMB IN.
a) Where honey combed surfaces are noticed in the concrete the contractor shall not
patch up the same until examined by the N.L.U.O's Engineer and decision given
regarding the acceptance with rectification of rejection of the same. If contractor
with rectification or rejection of the same. If contractor patches up such defects
without the knowledge of the N.L.U.O's Engineer, the N.L.U.O's Engineer will be at
liberty to order demolition of the concerned concrete members to the extent be
considers necessary. In such case, the contractor at his expense, shall reconstruct
demolished work. demolished work shall not be measured and paid for.
b) If in the opinion of the N.L.U.O's Engineer the honey combing is harmful to the
structure and where so directed by the Architect /Site Engineer, the full structural
members affected by dismantled and reconstructed to Architect/Site Engineer's
approval at Contractor's expense. The demolished concrete will not be measured and
paid for .
CONCRETING UNDER SPECIAL CONDITIONS :-
The specifications and references given in I.S.456-2000. for concreting in extreme weather
condition under water concreting, concrete in sea water, concrete in aggressive soil and
water should be adhered to.
2.0 The form work shall conform to the shape, lines and dimensions as shown on the
plans and be so constructed as to remain sufficiently rigid during the placing and
compacting of the concrete and shall be sufficiently water tight to prevent loss of
cement slurry from the concrete. If directed be the Architect/NLUO, building paper
or polythene sheets shall be used by the Contractor to ensure water tightness without
additional costs to the NLUO. Form work or centering shall be constructed on wet
concrete and laborers without deflection and retain its form during laying, ramming
and setting of concrete. Timber used shall be properly seasoned so as to prevent
wrapping when wetted.
All props either timber or steel shall be straight and or full height and no joints
shall be allowed. Props shall be braced with wooden battens and where additional
staging is necessary extra care should be taken to use bigger diameter props with
bracing at a 4 or 5 levels. All props shall be supported on sole plates and double
wedges. At the time of removing props, wedges shall be gently cased off and not
knocked out :-
All rubbish, chippings, shavings and saw dust shall be removed from the interior of
the forms before the concrete shall be cleaned and thoroughly wetted or treated if
considered necessary, with non sticking mineral oil or any other approved materials.
Care shall be taken that oil or such approved materials is kept out of contract with
the reinforcement.
All form work shall be removed without shock or vibration and shall be ceased off
caref1ully in order to allow the structure to take up its load gradually. Forms shall
108
CONTRACTOR NLUO
not be disturbed until concrete has adequately hardened to take the superimposed
load.
3.0
3.1 CLEANING OF REINFORCEMENT :-
Before steel reinforcement is placed in position, the surface of the reinforcement shall be
cleaned of rust, dust, grease and any other objectionable substances.
3.2 BAR BENDING SCHEDULE OF REINFORCEMENT :-
On receipt of structural drawing Contractor shall prepare bar bending schedule of
reinforcement and shall be got approved by the NLUO/Architect.
3.3 CUTTING OF REINFORCEMENT :-
Before Steel reinforcement bars are cut, the contractor shall study the lengths of bars
required as per drawing and shall carry out cutting only to suit the sizes required as per
drawings.
3.4 PLACING AND SECURITY :-
Reinforcement bars shall be accurately placed & secured in position and firmly supported
or wedged by pre-cast concrete blocks of suitable thickness, at sufficiently close intervals
that they will not sag between the supports or get displaced during the placing of concrete
or any other operation of the work. It is most important to maintain reinforcement in its
correct position without displacement and to maintain the correct specified cover. The
Contractor shall be responsible for all costs for rectification required in case the bars are
displaced out of their correct position.
3.5 BINDING WIRE :-
The reinforcement shall securely bond where ever cross or when ever required for with 18
gauge soft annealed steel wire.
3.6 WELDING:-
Welding of bars shall not be carried out unless specifically authorized in writing by the
NLUO/Architect as per I.S. code of practice in place of splicing. How ever no extra
payment shall be allowed for the same.
3.7 BEND ETC:-
Bends , cranks etc., in steel reinforcement shall be carefully for made. Care being taken to
keep bends out of winding, otherwise all rods shall be truly straight. If any bend shows
signs of or site minimum radius of nine times diameter of the bar shall be used unless
otherwise specified in the drawings. However in respect of standard hooks the radius of
bend shall be two times the diameter of bar. Heating of reinforcement of bars to facilitate
bending will not be permitted. The bars shall always be bend cold. In case of mild steel
reinforcement bars of larger sizes where colds bending is not possible they may be bend
by heating with written permission of the NLUO/Architect. Bar when bent shall not be
heated beyond very red colour and after bending shall be allowed to cool slowly without
109
CONTRACTOR NLUO
quenching. The bars damaged or weakened in any way in bending shall not be used on
the work. High strength deformed bars shall in no case be heated to facilitate bending
cranking.
3.8 INSPECTION OF REINFORCEMENT :-
No concreting shall be commenced until the NLUO/Architect have inspected the
reinforcement in position and until their approval have been obtained. A notice of at least 72
hours shall be given to the NLUO/Architect by the contractor for inspection of
reinforcement. If in the opinion of the NLUO/Architect any materials is incorrectly spaced,
bend or otherwise defective. The contractor shall immediately remove such materials from
the site and replace with new and rectify any other defects in accordance with the
instruction of the NLUO/Architect and to their entire satisfaction.
3.9 STOCK PILING OF STEEL :-
Reinforcement steel required shall be stock pilled well in advance of need in the work. The
Contractor shall stockpile advance of need in the work. The contractor shall stockpile
1/3rd requirement within15 days of commencement 2/3rd requirement at 1/4th contract time
and full requirement a 1/2 contract time.
3.10 COVER FOR REINFORCEMNT :-
Cover shall be measured from the outer surface of main reinforcement. Cover shall be as
follows.:-
a. At each end of a reinforcing bar 25 mm or twice the diameter of such rod or bar
whichever is greater.
b. For longitudinal reinforcing bar in beam 25mm or the diameter of such rod or bar
whichever is greater.
c. For tensile, compressive shear or other reinforcement in a slab 13 mm or the diameter of
such reinforcement whichever a greater.
d. For reinforcement in any other member such as a lintel, chajja, canopy 13 mm or the
diameter of such reinforcements whichever is greater.
e. For main reinforcement in isolated footings (side a bottom) clear cover shall be
50mm.
f. For column bars clear cover shall be 40 mm, unless otherwise specified in drawing.
g. For bars in slabs of strips footings and mat foundation clear cover shall be 50mm.
Beam bars shall be placed over slab in the case of beam & slab type foundation
h. For any other types. covers as specified in I.S. 456 shall be provided.
3.11 FORM WORK :-
MATERIALS AND DESIGN:-
a. The from work shall be of timber or plywood or steel. If any particular material or
materials be specified in the Schedule of quantities for form work such particularly
specified material or materials shall be used in work. The form work shall be so
constructed as to remain sufficiently rigid during placing of the concrete and shall be
sufficiently tight to prevent, loss of liquid from the concrete. The forms shall have
sufficient strength and rigidity to hold concrete and withstand the pressure of ramming
and vibration without excessive deflection of the prescribed lines and more so when
110
CONTRACTOR NLUO
the concrete is vibrated. The surface of the forms in contact with concrete shall be
clean, rigid, watertight and smooth. Suitable devices shall be used to hold corners,
adjacent ends and edges of panels of other forms together in accurate alignment.
If steel formwork is used the slab shuttering to be done with steel plates made out of
2mm sheets with pressed flanges and stiffener with standard shuttering made in
60mm width and 115, 100,90,80cm lengths with adjusters made in 40, 25 cm widths
and 115, 90,80,60cm lengths.
If tubular telescopic steel props are used then all steel scaffold tubes are to be of
40mm nominal bore mild steel continuous weld. props must be braced in both directions
by tube and right angle couplers at approximately 250mm above prop nut when
extended beyond 3.6m. All scaffolds fittings conform to I.S.2750:1968.
Timber shuttering :-
If timber is used it shall not be less than 30mm thick fixed on to rigid supporting
materials and scaffolding.
If shuttering plywood is used it should conform to IS-4990-1993. The plywood may
be fixed on to a timber frame or straight on to the rigid supporting materials and
scaffolding. The minimum thickness for straight surface should be 9mm and for
curved surfaces, minimum 6mm thick.
b. The form work shall conform to the shape, lines and dimensions to suit the RCC
members as shown on drawings and to be so constructed. Form work shall be
adequately designed to support the full weight of workers, fresh placed concrete without
yielding settlement or deflection and to ensure good and truly aligned concrete finished
in accordance with the construction drawings. A camber in all directions of 6mm for
every 5m span in all slab and beam centering shall be given to allow for a unavoidable
sagging due to compression or other causes.
c. The form work shall be so designed that the sides of the beams shall be first struck
leaving the soffit of beams and the supporting props in position. Props shall be
designed to allow accurate adjustment and to permit of their being struck without
jarring the concrete.
d. Temporary opening shall be provided at the base of column form and at other
points where necessary to facilitate cleaning and observation immediately before
concrete is deposited.
e. Vertical shuttering : The vertical shuttering shall be carried down to such solid
surface as is sufficiently strong to afford adequate support and shall remain in position
until the newly constructed work is about to support itself. Props shall be securely
braced against lateral deflection. Where timber props are used like bullies, they shall
be of a minimum diameter of 10cm. and shall be straight and adequately strong. The
spacing of such struts shall be designed to carry loads imposed on it without undue
deflection of the members supported by the props. The spacing of props shall be
approved by the site Engineer and any alterations suggested by him shall be carried
out at contractor's expense. Bracing shall be provided as directed without extra cost.
Contractor shall allow in his rates providing props and struts for any height shown in
the working drawings issued to contractor from time to time.
111
CONTRACTOR NLUO
3.12 WATER TIGHTNESS :
It is the contractor's responsibility to ensure that the forms are checked for water tightness
just before concreting operation starts and to make good any deficiencies.
3.13 CLEANING AND TREATMENT OF FORMS:
All rubbish, particularly chippings, shavings and sawdust shall be removed from the interior
of the forms before the concrete is placed and the form work in contract with the concrete
shall be cleaned and thoroughly wetted or treated with an approved composition. Care
shall be taken that such approved composition is kept out of contract with the
reinforcement.
3.14 STRIPPING :
Forms shall left in place until their removal is authorized by the site Engineer and shall
then be removed with care so as to avoid injury to concrete. In no circumstances shall
forms be struck until the concrete reaches a strength of at least twice the stress to which
concrete may be subjected at the time of striking. The strength referred to shall be that of
concrete using the same cement and aggregates with the same proportions, and cured
under conditions of temperature and moisture similar to those existing on the work where
possible, the form work shall be left longer, as it would assist the curing.
3.15 STRIPPING TIME :
In normal circumstances (generally where temperatures are above 20° C) and where
ordinary cement is used , forms shall be struck after expiry of the following periods given
in table VI.
TABLE-VI
___________________________________________________________________
LOCATION Striking
time in days for
Ordinary
pozzolana/
Portland cement
__________________________________________________________________
a. Vertical sides of walls, 24
slabs , beams and columns
b. Bottoms of slabs up to 4.5m span 7-14
c. Bottoms of slabs above 4.5m span,
bottoms of beams up to 6m span
rib bottoms up to 6m span 14-21
d. Bottoms of beams over 6m span and
arch rib bottoms above 6m span 21-30
Note 1: In case the shuttering for the part of the structure is supported or suspended
from the shuttering of the concrete member already cast then the shuttering of the
concrete member (already cast) supporting the new shuttering shall not be removed
until the concrete of the supported /suspended member is matured.
Note 2: Special care shall be taken while striking of the shuttering for (i) canopies (ii) chajja
(ii) cantilever slabs and beams and (iv) retaining walls, so as to ensure stability of
112
CONTRACTOR NLUO
these structural elements. Relevant notes given in the structural drawings in this
connection shall be strictly followed.
3.16 FORM WORK IN LIFTS FOR CONTINUOUS SURFACES :
Where forms for continuous surface are placed in successive units (as for example in
columns or walls), the forms shall fit tightly over the completed surfaces so as to prevent
leakage or mortar from the concrete and do maintain accurate alignment of the surface.
3.17 PROCEDURE FOR REMOVING THE FORM WORK :
All form work shall be removed without such shock or vibration as would damaged the
reinforced concrete. Before the soffit and struts are removed, the concrete surface shall be
exposed where necessary in order to ascertains that the concrete has sufficiently hardened.
Proper precautions shall be taken to allow for the decrease in the rate of hardening that
occurs with all cements in the cold weather. For cantilevers props shall be removed from
the tip towards support. Special notes given in relevant structural drawing shall be strictly
adhered to in order of avoid mishaps.
3.18 TOLERANCES :
The following shall be the maximum permissible tolerances :-
a. On general setting out dimensions up to 4m length, a tolerance up to 3mm will be
allowed.
b. On lengths or more than 4m tolerance of not more than 5mm will be allowed.
c. On the cross sectional dimensions of columns, beams, slabs, facia, chajja,
mullions, grilles, fins, louvers and such other members tolerance of more than
2mm will not be allowed.
d. the top surface of concrete floor slab shall be within 4mm of the level and
line shown on the drawings.
e. Column and walls and other vertical members shall not be more than 3mm out
of plumb in their storey height and not more than 6mm out of plumb in their
full height.
If the work is not carried out within the tolerances set out above in (a) to (e), the
cost of all rectification measures or dismantling and reconstructing as decided by
the Site Engineer shall be borne by the contractor. In case work is dismantled, the
same shall not be measured and paid for.1
113
CONTRACTOR NLUO
SECTION -III
BRICK MASONRY
1.0 BRICK WORK :
1.1 GENERAL :
All brick work should be carried out as shown on the drawings with set backs,
projections, curvatures, cuttings etc. No additional cost for use of cut bricks shall be
allowed. Wherever the proportion of cement mortar has not been specifically
mentioned, cement mortar in the proportion of (1:6) shall be used. Flat brick shall be
provided wherever required without any extra cost. Brick work shall be kept wet
while in progress till mortar has properly set. On holidays or when work is
stopped the top of all unfinished masonry shall be kept wet. Should the mortar
become dry, white or powdery, for want or curing, work shall be pulled down and
rebuilt at the contractor's expenses.
1.2 BRICK MASONRY :
a. SOAKING :
Bricks required for masonry shall be thoroughly soaked in clean water before use for at
least six hours until air bubbles cease to come out. The practice of dipping the bricks in
water just before use shall not be allowed. The soaked bricks shall be kept on wooden
planks or brick platform to avoid earth being smeared on them
b. BATS :
No bats or out bricks shall be used in the work unless absolutely necessary around
irregular openings or for adjusting the dimensions of different course and for
closures, in which case full bricks shall be laid at corners, the bats being placed on
the middle of the courses.
c. LAYING :
Brick work shall be laid in English Bond unless otherwise specified. Half or cut bricks
shall not be used except where needed to complete the bond. Each course shall be
perfectly straight horizontally and transversely. The walls shall be taken up truly plumb;
if battered, the batter is to be truly maintained. The level of the brick work in vertical
walls shall be checked up at every one metre interval.
Bricks shall be laid with frogs upward. While laying, bricks shall be thoroughly bedded
and flushed in mortar and tapped into position with a wooden mallet and the superfluous
mortar removed.
Walls of all structures shall be carried up regularly in all cases, leaving no part, one
metre lower than another. If this cannot be adhered to the brick work shall be racked
back at an angle not more than 45°, so as to maintain a uniform and effectual bond, but
racking back should not start within 60 cm of a corner.
Partially or totally set exposed surface of the masonry shall be cleaned, roughened and
lightly wetted so as to obtain the best possible bond with new work. All loose bricks and
mortar shall be removed. All masonry walls shall be bonded. Each course at corners and
intersections and shall be bonded or anchored to connecting work.
114
CONTRACTOR NLUO
No deductions or additions in measurement shall be made on any account for the
following :
a) ends of dissimilar materials(i.e joints, beams, lintels, posts,girders, rafters,
trusses, corbels, steps etc.) upto 500 sq.cm. in section and
b) opening upto 0.1 sq.m in section. However, full deduction from masonry
work shall be made for notches kept in the wall for pipeline.
At all angles forming the junction of any two walls, the brick shall, at each alternate
course, be carried into each of the respective walls so as to thoroughly unite the work.
The brick work shall not be raised more than 14 courses per day.
All iron fixtures, pipes, conduits, drains, sleeves, bolts, hold fasts for doors and windows
etc. which are required to be built in walls, shall be embedded in cement mortar or
cement concrete as specified as the work proceeds.
All uneven, irregular and disturbed brick work shall be pulled down and rebuilt with
fresh bricks at the contractor's expenses.
d. JOINTS :
Thickness of joints shall be restricted to 6mm in first class brick work and 10mm in
second class brick work (unless any wider vertical joints upto 13mm are necessary to
give the required thickness of the wall).
All bed joints shall be normal to the pressure acting upto them i.e. horizontal in vertical
walls, radial in arches and at right angles to the face in battered relating walls. The vertical
joints in alternate course shall come directly one over the other and shall be truly vertical.
Care shall be taken that all joints are fully mortared (proportion as specified Schedule of
Items) well flushed up and in case where no pointing is to be done neatly struck as the
work proceeds. The joints in faces which are to plastered or pointed shall be squarely
raked out to a depth of 12 mm while the mortar is still green. The raked joint shall be well
brushed to remove the loose particles. At the junction of concrete and masonry wall, G.I.
Chicken wire mesh, 150 mm wide and 22 SWG shall be provided, prior to plastering.
After the work, the faces of brick work shall be cleaned with wire brush so as to remove
any splashes of mortar during the course of raising the brick work
e. UNIFORM FACING :
Brick work shall be carried up regularly in all cases where the nature of work will
admit, not leaving any part 60mm. lower than another but where building at different
levels is necessary the bricks shall be stepped so as to give later at uniform level
& effectional bond. Horizontal courses should be to line and level, and face plumb or
to latter as shown on the plan.
f. SCAFFOLDING :
The scaffolding must be strong and rigid, stiffened with necessary cross bearers and
always checked and beared on the sills which closed board ceilings and swings to
prevent and injury of persons or materials. The Contractor shall have to allow other
trades to make reasonable use of his scaffolding as directed by the
NLUO/Architect, if for the interest of work the contractor have to erect scaffolding
in the other properties including local bodies. Corporation, the arrangement fro the
same including the cost of licensing fees etc., shall to be borne by ht e contractor
and the NLUO should be kept free form any liability on this account. But log holes
115
CONTRACTOR NLUO
shall be made good by bricks to match the face work when out logs are removed
after ensuring that the holes behind are solidly filled in with (1:4:8) cement
concrete.
All brick works shall be kept will watered for 14 days after laying If white
pozzolana cement issued for mortar the curing shall be extended by one week at
contractor's expenses.
2.0 HALF BRICK WORK :
The mortar for half brick thick walls shall be as specified. For half brick thick long walls 2
nos. 6mm dia mild steel bars shall be provided every third course according to standard
practice. M.S. bars shall be paid extra.
3.0 BRICK FLAT SOLING :
For soling, the bricks shall be picked of approved, sound, hard, durable, dense, free from
soft spots, cracks, decay and other defects. Brick bat shall not be used. All necessary
trimming or filling for laying of the soling in line and required grade shall be done . The
sub-grade shall be marked by stacking and strings for required depth for laying of soling.
The cushioning as well as filling of joints shall be done with local sand.
The bricks shall be laid on flat (Unless otherwise specified ) touching each other. Brick
shall be laid in parallel rows breaking bond or in herring bond pattern as directed and
firmly embedded true to line and filled with local sand. The joint should not be less that
12mm.
116
CONTRACTOR NLUO
SECTION -IV
PLASTERING
1 Scaffolding for carryout plastering work shall be double scaffolding having two sets of
vertical supports so that the scaffolding is independent of the walls.
2 Preparing of surface
The surface to be plastered shall be thoroughly cleaned so that it is free from
dust, dirt, salts, etc. The joints of masonry work shall be raked out to the depth of
atleast 12 mm. Cement concrete surfaces shall be cleaned with wire brush. The
surface in both cases shall be washed properly and kept wet for 4 hours before
plastering is commerced.
3 Mortar
Cement and sand shall be thoroughly mixed in the proportion specified and water
shall be added to form an easily workable paste. In no case shall mortar which
has been allowed to stand for more than an hour after mixing to be used.
4 Application of Plaster
Plaster, when more than 12 mm thick, shall be applied in two coats a base coat
followed by the finishing coat. Thickness of the base coat shall be sufficient to
fill up all unevenness in the surface, no single coat, however, shall exceed 12 mm
in thickness. The lower coat shall be thicker than the upper coat, the overall
thickness of the coats shall not be less than the minimum thickness shown on the
drawings. The undercoat shall be allowed to dry and shrink before applying the
second coat of plaster. The undercoat shall be scratched or roughened before it is
fully hardened to form a mechanical key. The method of application shall be
'thrown on' rather than 'applied by trowel'.
The entire plastering job inside and outside shall be a thoroughly sound and
workmanlike job. All corners and angles shall be true to plumb or level. All plane
surface shall be levelled or plumbed and shall contact a 3 m straight edge in its
entire length with not more than 3 mm variation either way.
The plastering shall start from top and gradually worked down towards floor. It
shall not, at any place, be thinner than specified. To ensure even thickness,
plaster in about 15 cm wide strip shall be first applied horizontally and vertically
at not more than 2 meter interval over the entire surface to serve as gauge. The
surface of these gauged areas shall be truly in the plumb and plane of finished
plaster surface. The mortar shall then be applied on the wall or other surface
between the gauges and finished even. All corners shall be rounded to a radius of
12 mm unless otherwise specified. Rounding or chamfering corners, junctions
etc. where required shall be done without extra payment. The contractor shall not
be paid for any extra thickness of plaster than as specified.
In case of sand-faced and rough cast plaster, specific instructions in the
specification of the same shall be followed for coats and finishing techniques. In
case of neat cement and neeru finish plaster specific instructions in the
specification of the same shall be followed.
117
CONTRACTOR NLUO
Any cracks which appear in the surface and all portions which sound hollow
when tapped or are found to be soft or other defects shall be cut out in
rectangular shape and redone as directed to match smooth and even with the
original surface.
5 Curing
Curing shall start 24 hours after the plaster is laid. It shall be kept wet for 7 days.
During this period it shall be suitably protected from all damages at the
contractor's expense as directed.
6 13 mm Neeru Cement Finished Plaster in CM as specified
Plaster shall be smooth finished with neat cement slurry.
7 13mm Neeru Plaster in CM 1:4
After completion of plaster for the panel in hand. Neeru shall be applied as
given below:
7.1 Preparation
Fat lime of best quality shall be slaked and mixed with sufficient water to
form a thick paste. It shall then be passed through a fine 3 mm mesh to
remove all unslaked particles and foreign matter and allowed to mellow
under water for atleast 10 days. The surplus water on top shall then be
allowed to run off and the top layer of lime formed into putty shall be
skimmed off and well mixed sand and jute. The proportion of sand shall
be of 1 cu.m. fine washed sand (passing through I.S. sieve No.60) to 4
cu.m. of lime putty. The jute shall be finely chopped and shall be used in
the proportion of 1 kg. per cu.m. of mortar.
7.2 The mixture shall be properly ground to fine paste between two stones or
in a mill. The 'neeru' thus prepared shall be kept moist until used and no
more than what can be consumed in 15 days shall be prepared at a time.
7.3 The 'Neeru' as prepared above shall be applied to the prepared surface
with a steel trowel to a thickness not exceeding 3 mm and rubbed and
polished to perfectly smooth and even finish working from top to bottom.
While trowelling is going on, soap stone powder contained in thin muslim
bags shall be dusted over the surface and worked in.
7.4 Ready mix Neeru, if used, shall be obtained from approved manufacturer.
A sample plaster finish shall be carried out at site and approved by
Engineer prior to ordering the material at site. Manufacturer's instructions
shall be followed in the sample as well as in the actual work.
8. 13 mm Water-proof Plaster in CM 1:4
Water proof-cement plaster shall be specified herein before for cement plaster work
except for the following.
118
CONTRACTOR NLUO
In the preparation of cement and sand mortar, cement shall be mixed with 2% approved
waterproofing compound or as per manufacturer's instructions and as directly by the
Engineer.
9. 20 mm Sand-face Plaster
Sand face plaster shall consist of two layers. The first layer shall be generally 12 mm
average thick cement plaster with cement sand of 1:4 mix (1 cement : 4 sand) and shall
be rough finished carried out by wire brush scarifying on wet plaster. Over this a second
layer, average 8 mm thick, of cement sand plaster in the proportion of 1:2 mix shall be
applied. The second layer of plaster shall be laid only after the first layer has sufficiently
dried. The surface of the sand face plaster shall be finished rough with sponge or as
directed by the Engineer.
10. Rough Cast Cement Plaster
The cement shall be thoroughly mixed with sand and gravel in the proportion of 1
cement : 2 sand : 1 aggregate. The gravel shall be of a size passing through 6 mm mesh
but retained completely on 2 mm mesh. The constituents shall be thoroughly mixed dry
until the mix is homogeneous. Water shall then be added gradually to the required extent
and the material turned over sufficiently to give a homogeneous mass of uniform colour.
Mortar shall be applied to the wall in 2
coats with force to a thickness of 20 mm and finished to a uniform surface. No more
mortar shall be prepared than can be used up with half an hour.
11. POINTING
11.1 Scope
Work includes providing, mixing CM 1:3 and applying cement pointing on masonry
surfaces indicated in the item, including all materials, labour, plants, tools, equipment,
scaffolding racking etc. required to complete the job in all respects.
11.2 Type of pointing
Pointing shall be of the type specified such as "flush", "recessed" (weathered, keyed,
ruled etc.), "tuck" etc.
11.3 Preparation of surface
All joints in masonry shall be raked out at least 12 mm deep when the mortar is firm but
not wet. The joints shall be brushed clean of dust with wire brush and wetted thoroughly
for 6 hours before pointing is commenced.
11.4 Application & Finishing
The mortar shall be pressed into raked out joints with a point trowel and finished either
flush, sunk or raised according to type of pointing specified in the drawings or as
directed. The superfluous mortar shall be cut off from the edges of the lines and the
surfaces of masonry shall be cleaned of all mortar. Finish shall be free of slick spots, cut
faces and other blemishes.
Finished work of pointing shall be to exact size and shape stipulated with edges straight,
neat and clean. No smearing of cement mortar shall be allowed and the entire work shall
be carried out in most workmanlike manner.
12. Drip Mould
119
CONTRACTOR NLUO
Drip mould shall be provided on underside and not more than 50 mm from outer edge in
chajjas and projection of roof slab and at places indicated by the Engineer and shall be of
minimum 10 mm in depth and 20 mm in width and well rounded from either in plaster or
concrete while casing. It shall be neat finished. The size and shape shall have to be
approved by the Engineer.
13. Damp Proof Course
Unless otherwise specified Damp-proof course shall be 40 mm thick 'artificial stone' in
proportion 1:1V23 cement, sand, stone chips (10 mm down) with admixture of a
waterproofing compound as approved by the Engineer.
SECTION -V
FLOOR FINISHING
1.0 TERRAZO (MARBLE CHIPS) FLOORING LAID IN SITU :
1.1. GENERAL :
The thickness of the under layer shall be measured with a permissible tolerance of + /-
3mm. The thickness of top layer after polishing shall be measured with a tolerance of + / -
1.5mm.
1.2 UNDER LAYER :
Cement concrete of specified mix shall be used. The panels shall be of uniform size, and
unless otherwise directed, generally not exceeding 1.5 sqm. in area & 1.2 meter in length
for inside situations. In exposed situation the length of any side of the panel shall
preferable be not more that 1.25 meters or as directed. Cement slurry @ 2 Kg. per Sqm.
shall be applied before laying of under layer over the cement concrete / R.C.C. surface.
1.3 STRIP FIXING :
Glass strips or aluminum strips as given in the schedule shall be fixed with their top at
proper levels.
1.4 TOP LAYER.
Mortar : The mix for terrazzo topping consist of grey cement with or without pigment,
marble power, marble aggregate (marble chips) & water. The cement & marble powder
shall be mixed in the prop. of 3 (Three) parts of cement power mix, the proportion of
aggregate by volume shall be as follows :
------------------------------------------------------------------------------------------------------------
Size of Aggregate Proportion of Aggregates
to binding mix.
------------------------------------------------------------------------------------------------------------
For predominantly grade ,0.00 and 1 2.00 parts
For predominantly grade, 2 and 2 1.75 parts
For predominantly grade,4 and 5 1.75 parts
------------------------------------------------------------------------------------------------------------
Grade No. Size of aggregate Minimum thickness
of top layer in mm.
------------------------------------------------------------------------------------------------------------
120
CONTRACTOR NLUO
00 1-2 6
0 1-4 9
1 4-7 9
2 7-10 12
where aggregate of size larger than 10 mm are used the minimum thickness of topping
shall not be less than 1.5 times the maximum size of the chips. Where large chips such as
20mm or 25mm are used they shall be used only with a flat shape and bedded on the flat
face so as to keep the maximum thickness of wearing layer. Before starting the work, the
Contractor shall get the sample of marble chips approved by the Architects. The cement to
be used shall be ordinary grey cement. White cement, colored cement or cement with
admixture of coloring matter of approved quality in the ratio to get the required shade as
ordered by the Architect. Coloring matter of approved quality in the ratio specified shall
be mixed dry thoroughly with the cement & marble powder and then marble chips added
& mixed as specified above. The full quantity of dry mixture of mortar required for a
room shall be prepared in a lot in order to ensure and protect from moisture. The dry
mortar shall be mixed with water in the usual way as and when sufficient water to make it
workable.
The terrazzo topping shall be laid while the under layer is still plastic, but has hardened
sufficiently to prevent cement from rising to the surface. This is normally achieved
between 18 to 24 hours after the under layer has been laid. A cement slurry preferable of
the same color as the topping shall be brushed on the surface immediately before laying is
commenced. It shall be laid to a uniform thickness slightly more than that specified in
order to get the specified finished thickness after rubbing. The surface of the top layer
shall be trowelled over, pressed and brought true to required level by a straight edge and
steel floats in such a manner that the maximum amount of marble chips come up and are
spread uniformly over the surface.
1.5 POLISHING, CURING AND FINISHING :
Polishing shall be done by machine. About 36 hours after laying the top layer, the surface
shall be watered and ground evenly with machine fitted with special rapid cutting grit
blocks (carborundum stone) of coarse grade (No. 60) till the marble chips are evenly
exposed and the floor is smooth. After the first grinding, the surface shall be thoroughly
washed to remove all grinding mud and covered with a grout of cement of/and coloring
matter in same mix and proportion as the topping in order to fill any pin holes that appear.
The surface shall be allowed to cure for 5 to 7 days & then ground with machine fitted
with fine grit blocks (No. 120). The surface is cleaned and repaired as before and allowed
to cure again for 3 to 50 days. Finally the third grinding shall be done with machine fitted
with fines grade grit blocks (No. 320) to get even and smooth surface without pin holes,
The finished surface should show the marble chips evenly exposed.
Where use of machine for polishing is not feasible or possible, rubbing and polishing shall
be done by hand, in the same manner as specified for machine polishing except that
carborandum stone of coarse grade (No. 60) shall be used for the 1st rubbing stone of
medium grade (No. 80) for second rubbing and stone of fine grade (No. 120) for final
rubbing and polishing.
After the final polish either by hand, oxalic acid shall be dusted over the surface @ 33 gm
per square meter sprinkled with water and rubbed hard with a namdah block (Pad of
woolen rags). The following day. the floor shall be wiped with a moist rag & dried with a
soft cloth and finished clean.
Curing shall be done by suitable means, such as laying moist sawdust or ponding water.
121
CONTRACTOR NLUO
1.6 PRECAUTIONS :
Flooring in lavatories and bathrooms shall be laid after fixing of water closet and squatting
pans & floor traps. Traps shall be plugged, while laying the floors opened after floors are
cured and cleaned. Any damage done to W.C.'s squatting pans and flow traps during the
execution of work shall be made good by the Contractor.
During cold weather, concreting shall not be done when the temperature falls below four
degree centigrade. The concrete placed shall be protected against frost by suitable
coverings. Concrete placed shall be protected against frost by suitable coverings. Concrete
damaged by frost shall be removed and work redone. During hot weather, precautions
shall not exceed Thirty Eight degree centigrade. No concreting shall be laid within half an
hour of the closing time or the day. Unless permitted by the Engineer-in-charge.
The floor shall be protected from any damage during the execution of work.
2.0 CERAMIC TILES FLOORING :
2.1 PREPARATION OF SURFACE AND LAYING :
Sub-grade concrete or the R.C.C. slab on which the tiles are to be laid shall be cleaned,
wetted and mopped. The bedding for the tile shall be with cement mortar 1:3 (1 cement : 3
coarse sand ) or as specified in the specification. The average thickness of the bedding
shall be 20mm while the thickness under portion of the tiles shall not be less than 12mm.
Mortar shall be spread, temped and corrected to proper levels and allowed to harden
sufficiently to offer a fairly rigid cushion for the tiles to be set to enable the mason to place
wooden plank across and squat on it.
Over this mortar bedding neat grey cement slurry of honey like consistency shall be spread
at the rate of 3.3 kg. of cement per square meter over such and area as soaked in water
washed clean and shall be fixed in this grout one after another, each tiles gently being
tapped with a wooden mallet till it is properly bedded and in level with the adjoining tiles.
The joint shall be kept as thin as possible and in straight lines or to suit the required
pattern.
The surface of flooring during laying shall be frequently checked with a straight edge
about 2m. long, so as to obtain a true surface with there required slops.
Where full size tiles cannot be fixed these shall be cut (Sawn) to the required size, and
their edge rubbed smooth to ensure straight and true joints.
Tiles which are fixed in the floor adjoining the wall shall enter not less than 10mm. under
plaster, skirting or dado.
After tiles have been laid surplus cement grout shall be cleaned off.
Painting and Polishing :- The joints shall be cleaned off the grey cement grout with wire
brush or trowel to a depth of 2mm to 3mm and all dust and loose mortar removed. Joints
shall then be flush pointed with white cement added with pigment if required to match the
color of tiles. The floor shall be washed and finished clean. The finished floor shall not
sound hollow when tapped with a wooden mallet.
3.0 CERAMIC TILES IN SKIRTING AND DADO :-
3.1 PREPARATION OF SURFACES :-
The joints shall be raked out to a depth of at least 15mm in masonry walls, while the
masonry is being laid. In case of concrete walls, the surfaces shall be hipped and
roughened with wire brushes. The surface shall be cleaned thoroughly, washed with water
and kept wet before skirting work is commenced.
122
CONTRACTOR NLUO
3.2 LAYING :-
12mm. thick plaster of cement mortar 1:3 (1 cement : 3 coarse sand ) of mix as specified
shall be applied and allowed to harden. The plaster shall be roughened with wire brushes
or by scratching diagonally closed intervals.
The tiles should be soaked in water, washed clean and a coat of cement slurry applied
liberally at the back of tiles and set in the bedding mortar. The tiles shall be tamped and
corrected to proper plane and lines. The tiles shall be set in the required pattern and butt
jointed. The joints shall be as fine as possible. Top of skirting of dado shall be truly
horizontal and joints vertical except where otherwise indicated.
Skirting & dado shall rest on the top of the flooring, Where full size tiles cannot be fixed
these shall be cut (Sawn) to the required size and their edges rubbed smooth.
3.3 CURING AND FINISHING :
The joints shall be cleaned off the grey cement grout with wire brush or trowel to a depth
of 2mm to 3mm & all dust & loose removed. Joints shall then be flush pointed with white
cement added with pigments if required to match the color of tiles. The surfaces shall then
be kept wet for seven days. After curing the surface shall be washed and finished clean.
The finished work shall not sound hollow when tapped with a wooden mallet.
4.0 ARTIFICIAL STONE FLORING :
Selection of materials, methods of mixing, placing and compacting shall generally
conform to the specification under plain and reinforced cement concrete described earlier.
A stiff mix consistent with workability shall be used.
4.1 PREPARATION OF SURFACE :
Before the operation for laying topping is started the surface of base concrete shall be
thoroughly cleaned of all dirt, loose particles, caked mortar, droppings and laitance of any
by scrubbing with coir or steel wire brush where the concrete has hardened so much that
roughening of surface by wire brush is not possible, the surface shall be roughened by
chipping or hacking at close intervals. The surface shall then be cleaned with water & kept
for 12 hours and surplus water shall be removed by mopping before the topping is laid.
4.2 LAYING :
The screed strips shall be fixed over the base concrete dividing it into suitable panels.
Before placing the concrete for topping, neat cement slurry shall be thoroughly brushed
into the prepared surface of the base concrete just ahead of the finish. Concrete of
specified proportion and thickness shall be laid in alternate panels to required level and
shape and thoroughly tamped.
4.3 FINISHING THE SURFACE :
After the concrete has been fully compacted it shall be finished by toweling or floating
with neat cement rendering Finishing operations shall start shortly after the compaction of
concrete and the surfaces shall be trowelled three times at intervals so as to produce a
123
CONTRACTOR NLUO
uniform and hard surface. The satisfactory resistance of floor to wear depends largely
upon the care with trowelling is carried out. The time interval allowed between successive
trowelling is very important. Immediately trowelling shall be done to give a level surface.
Excessive trowelling in the earlier stages shall be avoided as this tends to brings a layer
rich in cement to line surface. Some time after the first trowelling, the duration depending
upon the temperature, atmospheric conditions and the of cement used, the surface shall be
retrowelled to close any pores in the surface and to bring to surface shall be retrowelled to
close any pores in the surface and to bring to surface and to scrap off any excess water in
concrete or laitance. No dry cement shall be used directly on the surface to absorb
moistures or to stiffen the mix. The final trowelling shall be done well before the concrete
has become too hard but at such a time that considerable pressure is required to make any
impression on the surface if directly by the Architect approved minerals pigment shall be
added to the rendering to give desired color and shade to the flooring at no extra cost.
5.0 MARBLE STONE FLOORING :
5.1 DRESSING OF SLABS :
Every stone shall be hand/machine cut to the required size and shape, fine chisel dressed
on all sides of the stone shall be fully in contact with it. The top surface shall also be fine
chisel dressed to remove all waviness. The sides and top surface of slabs shall be machine
rubbed or table rubbed with coarse sand before paying. All angles and edges of the marble
slab shall be true, square and free from chipping and the surface shall be true and plane.
The thickness of the slabs shall be as specified in the description of the item, Tolerance of
+/-2mm. shall be allowed.
5.2 LAYING :
The sub-grade concrete or the R.C.C. slab on which the slabs are to be laid shall be
cleaned, wetted & mopped. The bedding for the slabs shall be with cement mortar 1:4 (1
cement :4 coarse sand).
The averages thickness of the bedding mortar under the slab shall not be less than 20mm.
The slabs shall be laid in the following manner :-
Mortar of the specified mix shall be spread the area of each slab, roughly to the average
thickness specified in the item. The slab shall be washed clean before laying. It shall be
laid on top, pressed, trapped with wooden mallet and brought to level with the adjoining
slabs. It shall be lifted and laid aside. The top surface of the mortar is allowed to harden bit
and cement slurry of honey like consistency cement per sqm. The edges of the slab already
paved shall be buttered with grey or white cement with or without admixture of pigment to
match the shade of the paved, shall then be lowered gently back in position and tapped
with wooden mallet till it is properly bedded in a joint as possible. Subsequent slabs shall
be laid in the same manner. After each slab has been laid, surplus cement or the surface of
the slabs shall be cleaned off. The flooring shall be cured for a minimum period of seven
days. The surface of the flooring as laid shall be true to levels and slopes as
instructed by the Architect/ Owner.
The slabs shall be matched as shown in drawings or as instructed by the
Architect/Owner. Slabs which are fixed in the floor adjoining the wall shall enter
not less than 12 mm. under the plaster, skirting or dado, The junction between wall
plaster and floor shall be finished neatly and without variness.
5.3 POLISHING AND FINISHING :-
124
CONTRACTOR NLUO
Slight unevenness at the meeting edges of slabs shall then be removed by fine
chiseling and finished in the same manner as specified in Para 7.3 above.
6.0 MARBLE STONE IN SKIRTING, DADO, RISERS STEPS ETC.
6.1 PREPARATION OF SURFACE :-
The masonry joints shall be raked or concrete surfaces hacked and roughened. If
considered necessary , the wall surface shall be cut uniformly to the requisite depth
so that the skirting face shall have the projection from the finished face of wall
as shown in drawings or as required by the Architect/ Owner. No additional cost
on this account shall be paid.
6.2 LAYING :
The risers of steps and skirting shall be set in grey or white cement admixed
with or without pigment to match the shade of the stone as specified in the
description of the item with the line of the slab of such a distance from the wall
that the average width or the gap shall be 20mm. and at no place the width
shall be less than 15mm. If necessary, the slab shall be held in position by
temporary M.S. hooks fixed in to the wall at intervals. The skirting or riser face
shall be checked for plane and plumb and corrected . The skirting shall thus be left
to harden then the rear of the skirting or riser slab shall be packed with cement
mortar 1:3 (1 cement : 3 coarse sand) or other mixed as specified in the description
of the item. The fixing hooks shall be removed after the mortar filling the gap has
acquired sufficient strength.
The joints shall be as fine as possible . The top line of skirting and risers shall be
truly horizontal and joints truly vertical, except where otherwise indicated.
The risers and skirting slab shall be matched as shown in drawing or as
instructed by the Architect/ Owner.
6.3 CURING. POLISHING AND FINISHING :
It shall be as specified in Para 8.3 as far possible except that cement slurry with or
without pigment shall not be applied on the surface and polishing shall be done with
hand. The face and lop skirting shall be polished.
125
CONTRACTOR NLUO
SECTION -VI
EXTERNAL AND INTERNAL PAINTING WORKS
1.0 WHITE WASHING WITH LIME :-
1.1 SCAFOLDING :
Wherever scaffolding is necessary, it shall be erected on double supports tied
together by horizontal pieces, which scaffolding planks shall be fixed. No. ballies.
bamboos or planks shall rest on or touch the surface which is being white washed.
For all exposed brick work or tile work, double scaffolding having two sets of
vertical supports shall be provided. The supports shall be sound and strong, tied
together with horizontal pieces over which scaffolding planks shall be fixed.
Note: In case of special type of brick work, scaffolding shall be got approved from
Architect/ Owner in advance.
Where ladders are used, pieces of old gunny bags shall be tied on their tops to avoid
damage or scratches to walls.
For white washing the ceiling , proper stage scaffolding shall be erected.
1.2 PREPARATION OF SURFACE :
Before new work is white washed the surface shall be thoroughly brushed free
from mortar droppings & foreign mater.
In the case of old work, all loose pieces & scales shall be scrapped of and holes
in plasters as well as patches of less than 50.00 sqm. area shall be filled up with
mortar of the same mix. Where so specifically ordered by the Architect/ Owner, the
entire surface of old white wash shall be thoroughly removed by scrapping and this
shall be paid for separately.
1.3. PREPARATION OF LIME WASH :
The wash shall be prepared from good quality fresh stone white lime The lime shall
be thoroughly slaked on the spot, mixed and stirred with sufficient water to make a
thin cream. This shall be allowed to stand for a period of 24 hours and then shall be
screened through a clean coarse cloth. 40gm. of gum dissolved in hot water, shall be
added to each 10 cubic decimeter of the cream. The approximate quantity of water
to be added in making the cream will be 5 liter of water to one kg. of lime.
Indigo ( Neel) up to 3gm, per kg. of lime dissolved in water shall be added and
wash stirred well. Water shall then be added at the rate of about 5 liters per kg. of
lime to produce a milky solution. In case of lime wash on the surface finished
with lime punning, no Indigo (Neel) should be used unless otherwise directed by the
Architect.
1.4 APPLICATION :
The white wash shall be applied with moon brush to the specified number of coats.
The operation of each coat shall consist of a stock of the brush given from the top
downwards, another from the bottom upward over the first stroke, and similarly
one stroke horizontally from the right & another from the left before it dries.
Each coat shall be allowed to dry before the next one is applied. Further each
coat shall be inspected and approved by the Architect / Owner before the
subsequent coat is applied. No portion of the surface shall be left out initially to be
patched up later on.
126
CONTRACTOR NLUO
For new work, three or more coats shall be applied till the surface presents a
smooth & uniform finish through which the plaster does not show. The finished dry
surface shall not show signs of cracking and peeling nor shall it come off readily
on the hand when rubbed.
For old work, after the surface has been prepared as described, in Para 1.2 and a
coat of white wash shall be applied over the patches and repairs. Then a single
coat or two more coats of whit e wash as stipulated in the description of the item
shall be applied over the entire surface. The whit e washed surface should present a
uniform finish through which the plaster patches do not appear. The washing on
ceiling should be done prior to that on walls.
1.5 PROTECTIVE MEASURES :
Doors, windows, floors, articles of furniture etc., & such other parts of the building
not to be white washed shall be protected from being splashed upon. Splashing
and froopings, if any, shall be removed by the contractor at his own cost and the
surfaces cleaned. Damages if any to furniture of fittings and fixtures shall be
recoverable from the Contractor.
2.0 CEMENT PAINT :
2.1 PREPARATION OF SURFACE :
For new working the surface shall be carefully cleaned of all mortar dropping, dirt,
algae, grease and other foreign matter by brushing & washing. The surface shall be
thoroughly wetted with clean water before the cement paint is applied.
In the case of old work, all loose pieces and scales, shall be cleaned of all dirt,
dust, algae, oil etc. by brushing and washing. pitting in plaster shall be made good
and coat of water proof cement paint shall be applied over patches after wetting
them thoroughly.
2.2 PREPATION OF MIX :
Cement paint shall be mixed in such quantities as can be used up within an hour
of its mixing as otherwise the mixture will set & thicken, affecting flow and finish.
Cement paint shall be mixed with water in two stages. The first stage comprise of 2
parts of cement paint and 1 part of water stained thoroughly and allowed to stand
for five minutes. Care should be taken to add the cement paint gradually to the water
and not vice- versa. The second stage shall comprise of adding further one part of
water to the mix and stirring thoroughly to obtain a liquid of workable and
uniform consistency. In all cases the manufacturer's instructions shall be followed
meticulously.
The lids of cement paint drums shall be kept tightly closed when not in use, as by
exposure to atmosphere the cement paint rapidly becomes air set due to its
hygroscopic qualities.
The solution shall be applied on the clean and wetted surface with brushes or
spraying machine. The solution shall be kept well stirred during the period of
application . It shall be applied on the surface which is on the shady side of the
building so that the direct heat of the sun of the surface is avoided. The method of
apply of the second or subsequent coats, the surface of the specification. The
completed surface shall be watered after the day's work.
The second coat shall be applied after the first coat has been set for at least 24
hours. Before application of the second or subsequent coats, the surface of the
previous coat shall not be wetted.
127
CONTRACTOR NLUO
For new work, the surface shall be painted with three or more coats of water proof
cement paint as found necessary to get a uniform shade.
For old work, the treatment shall be with one or more coats as found necessary to
get a uniform shade.
Water cement paint shall not be applied on surfaces already treated with white wash,
color wash, distemper dry oil bound, varnishes, paints, etc., It shall not be applied on
gypsum, wood and metal surfaces.
The specifications in respect of scaffolding, protective measures, measurements and rate
shall be as described under white washing with lime.
3.0 PAINTING :
Approved paints, oil or varnishes shall be brought to the site of work by the
Contractor in their original containers in sealed condition. The materials shall be
brought in at a time in adequate quantities to suffice fro the whole work or at least
a fortnight's work. The empties shall not be removed from the site of work, till the
relevant item of work has been completed and permission obtained from the
Architect/NLUO.
Oil bound Washable Distemper.
3.1 Material
Material for oil bound distemper shall be of approved make and manufacturer. A
sealed tin ready mixed distemper of selected make shall be opened in presence of
Engineer.
3.2 Surface Preparation.
This includes scraping uneven surface, damaged plaster, etc. with carborundum
papers of suitable number till hard, clean surface is obtained. This is to be
repeated till the work is approved by the Engineer. Putty shall be used to cover
holes and unevenness on the surface.
3.3 Preparation and application of Putty.
Putty will be prepared as under. It shall be prepared from English whiting chalk,
linseed oil, white zinc and plater of paris in the prop. of 7:1:2:1. However, exact
proportion shall be decided as per site condition. Water, if required, can be added
as per the instructions and requirements to have proper consistency and stickness.
Putty should be smooth and free from any coarse ingredient, etc.
Application of putty should be started only after approval of surface area by the
Engineer. It should be applied on the whole surface to make the surface smooth.
No lumps should be allowed to dry completely.
After drying, the surface should be scraped with sand/emery paper till smooth
surface is obtained.
If no proper smoothness is obtained again apply primer, putty, etc. and repeat the
process as mentioned above, till the surface is perfect smooth as per instructions.
After application of first coat of putty, the surface shall be allowed to dry for 24
hours. sand papering shall then be done to give smooth surface.
Subsequent applications of putty and sand papering shall be done till the
Engineer is satisfied about final surface, which should be absolutely even,
levelled and smooth.
128
CONTRACTOR NLUO
3.4 Primer application
Primer should be a cement primer, or as per manufacturer's specification
(manufacturer same as that of distemper). These tins should be opened in
presence of the Engineer. Before applying primer on the surface, its consistency
must be approved by the Engineer and shall be same as specified by the
manufacturer. Primer should be applied with smooth brushes on surface to cover
entire surface properly. There should be no brush marks, stripes, etc. when
applied on the surface. This surface should be allowed to dry at least for 24 hours
before next application.
3.5 On the surface so prepared, two coats of oil bound distemper of selected shade
shall be applied only after inspection by the Engineer. A horizontal and vertical
travel of brush together will be considered as one coat of paint. Each coat of paint
shall be applied only after inspection of Engineer. No brush marks shall be
visible on the surface at the end of final coat. Final surface shall be smooth, even
or roller finish and uniform in colour and texture.
3.6 Acrylic Emulsion Paint
Paint shall be of approved quality and shades
Surface preparation, primer and putty application shall be as per clause 3.2, 3.3, 3.4.
Two coats of Acrylic emulsion paints shall be applied as per manufacturer's specification. The
surface on finishing shall present a flat velvety smooth finish.
3.7 Synthetic Enamel Painting
Surface preparation shall be by hand cleaning. Primer shall be zinc cromate or zinc phosphate
(pigmented in alkyed or phenolic medium of approved make, British or Asian Paints) of
minimum 38 microns dry film thickness. The coats of synthetic enamel paint of approved make,
British Luxol-3 or Asian apcolite, of total 100 microns DFT shall be applied as directed by the
Engineer.
4.1 COMMERCIAL WORK :
Painting shall not be started until the Architect/ Owner has inspected the items of
work to be painted , satisfied himself about their proper quality and given his
approval to commence the painting work. Painting of external surface should not be
done in adverse weather conditions like hail storm and dust storm.
Painting except the priming coat, shall generally be taken in and after practically
finishing all other builders work. The rooms should be thoroughly swept out and
the entire building cleaned up at least one day in advance of the painting work being
started.
4.2 PREPARATION OF SURFACE :
The surface shall be thoroughly cleaned and dusted . All rust, dirt, scales, smoke and
grease shall be thoroughly removed before painting is started. The prepared surface
shall have received the approval of the Architect /Owner after inspection, before
painting is commenced.
4.3 APPLICATION :
129
CONTRACTOR NLUO
Before pouring into smaller container for use, the paint shall be stirred thoroughly
in the containers. When applying also, the paint shall be continuously stirred in the
smaller container so that its consistency is kept uniform.
If for any reasons , thinning is necessary in case of ready mixed paint, the brand
of thinner recommended by the manufacturer or as instructed by the Architects/
NLUO shall be used.
The painting shall be laid on evenly and smoothly by means of crossing and
smoothly by means of crossing and laying off , the latter in the direction of the
grain of wood. The crossing & laying of consists of covering the area over with
paint, brushing the surface hard for the first time over and ten brushing alternately
in opposite direction, two or three times and then finally brushing lightly in a
direction at right angles to the same. In this process, no brush marks shall be left
after laying off is finished. The full process of crossing and laying off will
constitute one coat. Where so stipulated the painting shall be done by spraying.
Spray machine used may be (a) high pressure (small air aperture) type (b) a low
pressure (large air aperture) type, depending on the nature and location of work to
be carried out. Skilled and experienced workmen shall be employed for this class of
work. Paints used shall be brought to the requisite consistency by adding a suitable
thinner.
Spraying should be done only when dry condition prevails. Each coat shall be allowed to
dry thoroughly and rubbed smooth before the next coat is applied. This should be
facilitated by through ventilation. Each coat except the last coat, shall be lightly rubbed
with sand paper or with pumice stone and cleaned off dust before the next coat is laid.
No left over paint shall be put back into the stock tins. When not in use the container shall
be kept properly closed.
No hair marks from the brush or clogging of paint puddles in the corners of panes, angles
of moldings etc., shall be left on the work.
In painting doors and windows, the putty round, the glass panes must also be painted, but
care must be taken to see that no paint stains etc. are left on the glass top of shutters and
surfaces in similar hidden location shall not be left out in paint.
In painting steel work, special care shall be taken while painting over bolts, nuts, rivets,
overlaps etc.
The additional specifications for primer & other coats of paints shall be as according to the
detailed specifications under the respective headings.
4.4 BRUSHES AND CONTAINERS :
After work, the brushes shall be completely of paint and linseed oil rinsing with
turpentine. A brush in which paint has dried up is ruined and shall on no account be used
for painting work. The containers when not in use, shall be kept closed and free from air
so that paint does thicken and also shall be kept safe from dust , When the paint has been
used, the containers shall be washed with turpentine and wiped dry with soft clean cloth,
so that they are clean, and can be used again.
5.0 PRIMING COAT ON WOOD, IRON OR PLASTERED SURFACE :
5.1 PREPARATION OF SURFACE :
i. WOODEN SURFACE
The wood work to be painted shall be dry and free from moisture. The surface shall be
thoroughly cleaned. All unevenness shall be rubbed down smooth with sand paper and
shall be well ducted, Knots, if any, shall be covered with preparation of red lead made by
130
CONTRACTOR NLUO
grinding red lead in water and filled materials with same shade as paint shall be used
where specified .
The surface treated for knotting shall be dry before painting is applied. After the priming
coat is applied, the holes and indentations on the surface shall be stopped with glaziers
putty or wood putty. The primer shall be prepared on site or shall be of approved brand
and manufacture as specified in the item. Paint shall be anti-corrosive bitumastic paints,
aluminum paint or other types of a paint as specified in the description of the item.
Stopping shall not be done before the priming coat is applied as the wood will absorb the
oil in the stopping and then latter is therefore liable to crack.
ii. IRON AND STEEL SURFACE :
All rust and scales shall be removed by scrapping or by brushing with steel wire brushes.
Hard skin of oxide formed on the surface of wrought iron during rolling which become
loose by rusting, shall be removed.
All dust and dirt shall be thoroughly wiped away from the surface.
If the surface is wet, it shall be dried before priming coat is undertaken
iii. OKASTERED SURFACE :
The surface shall ordinarily not be painted until it has dried completely. Trial patches of
primer shall be laid at intervals and where drying is satisfactory, painting shall then be
taken in hand. Before primer is applied, holes and undulations, shall be filled up with
plaster of Paris and rubbed smooth.
5.2 APPLICATION :
The primer shall be applied with brush, worked well in to the surface and spread even
smooth. The painting shall be done by brushing and laying off as described in cement
paint above.
6.0 Painting with ready mixed paint/synthetic enamel paint :
6.1 Painting on new surface :
The surface, which has not been painted earlier, or the paint has been removed by paint
remover, burning, caustic soda etc., shall be considered to the new surfaces.
6.2 PREPARATION OF SURFACE :
i. WOOD WORK :
The surface shall be cleaned and all unevenness removed as specified in wooden
surface. Knots if visible shall be covered with a preparation of red lead. Holes, and
indentations of the surface shall be filled in with glazier's putty and rubbed smooth
before painting is done. The surface should be thoroughly dry before painting.
ii. IRON AND STEEL WORK :
The priming coat shall have dried up completely before painting is started. Rust &
scaling shall be carefully removed by scrapping or by brushing with steel wire
brushes. All dust and dirt shall be carefully & thoroughly wiped away.
131
CONTRACTOR NLUO
iii. PLASTERED SURFACE :
The priming coat shall have dried up completely before painting is started. All dust
or dirt that has settled on the priming coat shall be thoroughly wiped away before
painting is started.
6.2 APPLICATION :
The specification described in cement paint shall hold good as far as applicable. The
number of coats to be applied will be as stipulated in the item. The painted surface
shall present a uniform appearance and glossy/mat finish as described in schedule
of quantities free from streaks , blisters etc.
6.4 PAINTING AN OLD SURFACE :
The surface which has been painted earlier shall be considered to be old surface.
6.5 PREPARATION OF SURFACE :
i. WOOD WORK :
If the old paint is sound and firm and its removal is considered necessary the
surface shall be rubbed down with pumice stone after it has been cleaned of all
smoke and grease by washing with lime and rinsing with water and drying. All dust
and loose pint shall be completely removed. The surface shall then be washed with
soap and water.
If the old painted surface is blistered or flaked badly, paint shall be completely
removed with the application of a paint remove following the specification of the
manufacturer. The paint remover shall be of a brand and manufacturer approved by
the Architect / Owner. It shall be free from alkaline matter and non caustic so that
it can be handled by workmen without injury. It shall be of non flammable quality
as far as possible and such removal shall be paid for separately. Holes and cracks
if any shall be stopped with glazier's putty or wood putty. Further the painting itself
shall be treated as on new surface and paid for accordingly.
ii. IRON AND STEEL WORK :
If the old paint is sound and firm and its removal is considered unnecessary, it shall
be rubbed with wire brushes and any loosened paint taken off. All dust shall be
thoroughly wiped away. This surface shall then be wiped finally with mineral
turpentine to remove grease and perspiration of hand marks etc., and then allowed
to dry.
If the old painted surface is in bad condition and blistered and flaked, the old
paint shall be completely removed and the surface prepared as described in above .
Such removal shall be paid for separately. The painting including the priming coat
shall be treated as on new work and paid for accordingly.
7.0 FRENCH SPIRIT POLISHING :
Pure cello varying from pale orange to lemon yellow colour free from resin or
dirt shall be dissolved in methylated spirit at the rate of 140 gm. of shellac to 1
liter of spirit. Suitable pigment shall be added to get the required shade.
132
CONTRACTOR NLUO
7.1 POLISHING NEW SURFACES :
Preparation of surface - The surface shall be cleaned. All unevenness shall be
rubbed down smooth with sand paper and well dusted. Knots if visible shall be
covered with a preparation of red lead and glue sized and used hot. Holes and
indentations of the surface shall be sloped with glaziers putty. The surface shall be
then given a coat of wood filler made by ming whiting (Ground Chalk in
methylated spirit at the rates of 1.5 kg. of whiting per liter of spirit). The surface
shall again be rubbed down perfectly smooth with glass paper and wiped clean.
7.2 APPLIACATION :
The number of coats of polish to be applied shall be as decided by the Architect
to get the desired finish. A pad of woolen cloth covered by the fine cloth shall be
used to apply the polish. The pad shall be moisture with the polish and rubbed
hard on the wood, in a series of overlapping circles applying the mixture sparingly
but uniformly over the entire area to give an even level surface. A trace of linseed
oil on the face of the pad facilitates this operation. The surface shall be all owed
to dry and the pad shall be covered with a fresh piece of clean fine cotton cloth
slightly damped with methylated spirit and rubbed lightly and quickly with circular
motions. The finished surface shall have a uniform texture.
133
CONTRACTOR NLUO
SECTION -VII
CARPENTARY AND JOINERY WORKS
1.0 GENERAL :
Arrangement for procurement of timber section shall be made with the receipt of
order of facilitate natural air seasoning at site.
The Contractor shall invariably submit test certificate in cases where seasoned and
treated timber have been specified. Arrangements for test check at site for random
samples shall be made by the contractor.
No timber material shall be painted till such time it has been approved by the
Architect/NLUO. A coat of primer shall immediately be applied on receipt of
approval from the Architect/ NLUO. The final painting shall be done as indicted
in the schedule or as directed by the Architect/NLUO, when all other works are
generally completed and Architect/NLUO has given approval to proceed with final
painting.
If after finishing and erection of wood work any undue shrinkage or cracks due to
bed workmanship or material is found, the contractor shall remove the same & supply
better and approved materials at his own cost.
All wood savings, cuttings and other rubbish shall be removed and the site left
clear as the work progress. All precautions against fire shall also be taken by the
contractor.
2.0 WORKMANSHIP :
2.1 FRAME :
The workmanship shall be first class and to the approval of the Architect/NLUO .
Scantlings and boarding shall accurately be sawn and shall be of the required
width and thickness with allowable tolerance. All carpenter's work shall be wrought
( Planed) except where otherwise described. The workmanship and joinery shall be
accurately set out in strict accordance with the drawings and shall be framed
together and securely fixed in approved manner with properly made joints. All
work is to be properly tennoned, shouldered, wedged, pinned, bided, etc. and properly
glued with approved quality adhesive to the satisfaction of the Architect/Owner.
All wedges of timber frames shall be protected from being damaged during
construction by providing rough timber casing securely fixed and other adequate
protective measures.
Door/ Windows frames shall have cut rebates. Planted rebates unless shown in
drawing shall not be permitted.
All fully fabricated timber shall be air- seasoned at site for about two months to
allow for any shrinkage that may take place. As such it is desirable that the
fabrication of frames is started with the commencement of the project work.
The faces of frames or any timber coming in contact with masonry or concrete or
embedded in ground shall be treated with hot tar primer or crested before they are
placed in position.
No frames shall be painted until it is inspected by the Architect/NLUO and passed.
Immediately after it is passed it shall be given a coat of primer. the final painting or
polishing shall be done only when advised by the Architect/NLUO.
134
CONTRACTOR NLUO
2.2 ANCHOR FASTNER
Three anchor fastner shall be fixed to each post of the door frame . The M.S.
anchor shall be of 150 mm or as required at site and shall be fixed to the frames
by means of screws and not nails . The other end of the anchor fastner shall be
fixed into jambs with [1:2:4] P.C.C. of dimensions as directed. Ends of anchor
fastnerwill be fish tailed. Corner straps of M.S. sheets shall be provided and fixed on
corners with screws.
Whenever asked for metal fastener or bolts as directed shall be used for rough
ground, framing, hangers etc.
The rates quoted for wood work and joinery shall include the cost for all types of
anchor fastner directed ( Horns for frames shall be cut and shall not be used as
anchor fastner) cement grouting and fixing to frame work with screws etc. all
materials, wastages , labour, T&P hoisting and fixing in position at all heights and
depths, providing two coats of creosote /so lignum air seasoning of wood.
2.3 FLUSH DOOR
Providing and fixing ISI marked 35 mm thick flush door shutters decorative type, core of
block board construction with frame of 1st class hard wood and well matched commercial
board shutters with ISI marked Stainless Steel butt hinges with necessary screws etc. all
complete. The door shall be finished with approved shade enamel paint of two coats over a
coat of primer. 4 mm thick teak wood leaping shall be provided periphery of the door with teak
wood beading design and including all fittings etc. complete
2.4 Providing, fitting and fixing of M.S.door as per approved design with all fitting fixture
including two coats of approved coloured enamel paint over a coat of primer etc. all complete
and as per the direction of Engineer-in-charge.
2.5 SHUTTERS :
Shutters shall be planed at site to match the finished dimension between rebates of
frames leaving and uniform gap of not more than 3mm. between the frame and the
shutter end. shutters shall be hung by screws, as per drawing and specification and
properly threaded in. The finished work shall be true to plumb and true to shape.
The shutters. shall be so fixed, that while closing , the left hand leaf of the
shutters is closed first and the right hand leaf of the shutter overlaps on the left
hand leaf by minimum 20mm.
135
CONTRACTOR NLUO
SECTION -VIII
SPECIFICATION FOR WATER PROOFING.
1.0 DAMP PROOF COURSE (D.P.C.) :
D.P.C. shall be of thickness as shown in drawing or in the bill of quantities. Unless
otherwise mentioned, prop, shall be 1 part of cement, 2 parts of sand, 4 parts of aggregate
mixed with approved water proofing compound @ 3% by weight of cement or as per
manufacturer specification. Before laying the concrete, the top surface of the wall shall be
thoroughly cleaned of all dirt and loose particles, mortar dropping and laitance of any,
scrubbing with coir or steel wire brush or by hacking, if necessary, The surface is then
thoroughly wetted and the concrete is placed. The concrete shall be laid in every case the
full width of the plinth or as shown in drawing. The top surface shall be kept rubbed or
rough or double chequered for adhesion of mortar for brick work over D.P.C. On top of
D.P.C. bitumen painting is to be done as per I.S. specification.
1.1 METHOD OF MEASUREMENT :
D.P.C. shall be measured net in square meter.
2.0 CEMENT BASED WATER PROOFING :
MATERIAL :
Water proofing compound confirming to I.S. 2645 shall be used only as per enlisted/
approved manufactured.
2.2 PROPORTION, MIXING AND WORKMANSHIP :
The surface shall be well cleaned by water before the treatment. Then a slurry coat of neat
cement using 2.75 Kg./Sqm of cement admixed as per manufacturer‟s instructions will be
grouted water proofing compound conforming to IS: 2645 over the RCC slab.
The cement concrete shall be laid using broken bricks/brick bats 25mm to 100mm size
with 50% of cement mortar 1:5 (1 cement : 5 coarse sand) admixed with approved water
proofing compound conforming to IS :2645 to required slope and treated similarly the
adjoining walls up to 300mm height including rounding of junctions of wall and slabs, in
the form of ghoondies at rain water pipe.
After two days of proper curing apply a second coat of cement slurry admixed with
approved water proofing compound conforming to IS : 2445.
The surface will be finished with 20mm thick joint less cement mortar of mix 1:4
(1cement : 4coarse sand) admixed with approved water proofing compound conforming to
IS : 2645 and finally finished the surface with trowel with neat cement slurry and false
thread marking of 300x300mm square.
The whole area so finished shall be flooded with water for a minimum period of two
weeks for curing and for final test.
The average thickness of the treatment shall be 120 mm and the minimum thickness near
khurra /rain water outlets shall be not less than 65mm.
136
CONTRACTOR NLUO
SECTION -IX
METAL DOORS, WINDOWS AND VARIOUS STEEL WORKS.
1. GRILLS AND RAILINGS :
The grills and railings for windows, verandah & balcony etc., shall be of mild steel. The
design of grills/railings and shape and sizes of various a component shall be according to
the drawings.
The edge angles and corners shall be cleaned and true to shape. The joints, if possible
shall be mechanically inter locked and neatly spot welded in such a way that the grills is
rigid. Grinding of the joins to achieve at neat regular finish shall be done. The grills shall
be fixed to true plumb line and level as per drawings. Grills etc. shall be painted with one
coat of approved primer before they are fixed. The final painting shall be done only after
obtaining approval the Architect/Consultant.
2. Aluminum sections for fabricating fame work door, windows, jallies, etc, shall be of
extruded sections conforming to I.S 1948, 1949 or latest edition or as per drawing or as
manufactured by Indian Aluminum Co. Ltd. or approved equivalent. The alloy used shall
conform to I.S. designation H.E. WP I.S. 733.
137
CONTRACTOR NLUO
GENERAL DEVELOPMENT AND ROAD WORK.
1.0 CONCRETE ROAD :
Specifications for aggregate cement and concreting shall be as Specified in the section
under "Materials"
Before concreting the surface shall be checked for the given profile. Wooden forms equal
to the depth of roads of road slab thickness shall be erected to correct line and level and
held by stakes driven two takes being placed at each joint. Forms should be supported,
strengthened or braced, wherever necessary so that they are able to prevent & resist
deformation under pressure of concrete or impact of tamping or vibrating, Working faces
of all forms shall be thoroughly cleaned and billed before use and forms which are use
more than once, shall be carefully examined and true if necessary before reuse,
Sub-grade shall be properly moistened before any concrete is deposited on it, care being
taken to see that there are no standing pools of water. It may be advisable to have the sub-
grade watered 12 to 24 hours in advance of placing concrete. Concrete shall be laid in
alternate bays not exceeding 30sqm.
Concrete shall be deposited on sub-grade for the entire width of the slab and shall be kept
sufficiently above the level of forms so that when tamped, it shall become a level mass.
Reinforcement if specified shall be placed in correct position before commencing
concreting.
The concrete shall be brought to the specified contour by means of heavy screed or tamper
fitted or tampered handles weighing not less than 10 Kg./meter and not less than 7.5cm
wide or surface vibrator if directed by drawn with at sawing motion in
combination with a series of lefts and ropes. At transverse joint tamper shall be drawn not
closer than one meter towards the joint and thrown. Surplus concrete shall then be taken
up with shovels and thrown a head of the joint. Immediately after screeding or tamping
has been completed the surface shall be inspected for high and low spots and any needed
correction made by adding or removing concrete. The entire surface shall then be floated
with handed floats one meter long and 7.5cm. wide and this operation must be performed
from bridges provided across the slab. The surface shall be roughened by brooming. The
longitudinal & transverse edge of the slabs shall be properly formed with suitable tools
and the same should be rounded to 10mm radius.
The finished surface of the slab must conform to the grade, alignment and contours as
directed and cured for 14 days. After curing periods is over the joints shall be filled up
with approved bitumastic filler. Unless otherwise specified, the rate shall include filling of
joints as specified.
Expansion joints shall be provided as per drawings/direction of the Architect/Owner.
NLUO whose duty will be to supervise all stages of designing the mix preparation and
placing of concrete. All cubes shall be made & site tests carried out under his direct
supervision in the presence of Architect/ NLUO /Owner / Consultant.
138
CONTRACTOR NLUO
TECHINAL SPECIFIANTIONS
FOR
ANTI-TERMITE SOIL TREATMENT WORK
Anti termite soil treatment to the following :-
1.1 CHEMICALS :
The treatment of theses shall be carried out by applying one of the following chemicals at
not less than the designated concentration :
CHEMICALS CONCENTRATION
Chloropyriphos 20% E.C. 1%
Endosulfan 0.5%
The tender shall clearly indicate along with the quotation the chemical he proposed to use.
A daunt record shall be maintained by the Contractor indicating the amount of work done
and the quantity of chemical consumed for the work. This record shall be the property of
the NLUO.
1.2 METHOD OF APPLICATION
(1) TREATMENT FOR MASONARY FOUNDATION AND BASEMENT
The bottom surface and sides (Up to a height of 30cm from the bottom) of the excavations
made for masonry foundations and basements shall be treated with the chemical emulsion
mentioned above at 5 Liters. Per sqm of surface area.
(2) TREATMENT TO BACKFILL EARTH :
After the masonry foundation and retaining walls of the basement come up the backfill in
immediate contact with the foundation structure shall be treated with the chemical
emulsion at the rate of 7.5 Liters. per sqm of the vertical surface of the sub-structure r for
each side. The earth is usually returned in layers & the treatment shall be carried out in
similar stages.
(3) TREATMENT FOR R.C.C. FOUNDATION & BASEMENT :
In the case of R.C.C. foundation (1:2:4) mix or richer, the treatment shall start at a depth
of 50cm below the ground level except when ground level is raised or lowered by
filling or cutting after the foundations have been cast. In such case the depth of
50cms shall be determined from the new soil level resulting from filling or cutting
mentioned above and soil in immediate contract with the vertical surface of R.C.C.
foundations. From this depth the backfill around the columns, beams and R.C.C.
basement walls shall be treated at the rate of 7.5 liters per sqm.
(4) TREATMENT OF TOP SURFACE OF ALINTH FILLING
The top surface of the consolidated earth within the walls shall be treated with the
chemical emulsion at the rate of 5 ltrs., per sqm , of the surface before the sand bed
or sub grade is laid. If the filled earth bas been well rammed and the surface does
not allow the emulsion to seep through, holes up to 50 to 75 mm deep at 150mm
center as both ways may be made with 12mm dia M.S. rod on the surface facilitate
absorption of the emulsion.
139
CONTRACTOR NLUO
(5) TREATMENT AT JUNCTION OF WALLS & FLOOR :
A small channel 3x3 cm., shall be made at all the junctions of walls and columns with
the floor ( Before laying the sub grade) & rod holes made in the channel up to
ground level 15 cm apart the rod moved backward and forward to break up the
earth & chemical emulsion poured along the channel at the rate of 7.5 liters., per
sqm., of the vertical wall or column surface of the sub-structure so as to soak the
soil right to the bottom.
(6) TREATMENT OT SOIL ALONG EXTERNAL PERIMETER OF BUILDING :
After the building is complete the earth along the external perimeter of the building
should be redden at intervals of 15 cm & to a depth of 300 cm. The rods should be
moved backward and forward parallel to the wall to break up the earth and chemical
emulsion poured along the wall at the rate of 7.5 Liters. per sqm. of vertical
surfaces. After the treatment the earth should be tamped back into place .
(7) TREATMENT OF SOIL SURROUNDING PIPES WASTES AND CONDUITS :
When pipes, wastes and conduits enter the soil inside the area of the foundation,
the soil surrounding the point of entry must be loosened around each such pipe waste
or conduits for a distance of 15cm and up to a depth of 7.5 mm before the
treatment is commenced. When they enter the soil external to the foundations, they
shall be similarly treated unless they stand clear of t he walls of the building by
about 7.5cm for a distance of over 30cm.
(8) SPRAYING EQUIPMENT :
A pressure pump shall be used to carry out spraying operations to facilitate proper
penetration of chemicals into the earth.
1.3 GUARANTEE :10 YEARS
In the unlikely even of any treatment becoming unnecessary subsequently during the
guarantee period, required inspection and treatment shall be carried out free of cost.
1.4 INSTRUCTIONS OT CONTRACTOR FOR QUOTING RATES. :
The tenderer should include in his rates given in schedule of Quantities in sq. meter
area all the stages of treatment to bottom foundation, sides of trenches, underside of
the floor, underside/ damp proof course, in the outer face of external wall up to
window sill level, door and window frames to ground floor area, which comes in
contact wit the brick wall and finally the trenches treatment all found the buildings
as per detailed specifications mentioned above. Where the rates of application of the
insecticide has not been specified clearly the rates shall be the guarantee period no
trouble may arise. Payment will be made on the plinth area measurement and the
rates for the same should include all the stages of work as mentioned above and
no extra on this account will be entertained.
140
CONTRACTOR NLUO
SECTION - XII
PILE WORK
1 MATERIALS :
1.1 Cement :
The cement used shall conform to the requirements of IS : 269-1976, IS : 455-1976, IS :
8041-19788, IS : 6909-1973 or IS : 1489-1976.
1.2 Steel :
Reinforcement steel shall conform to IS : 1139-1966 or IS : 1786-1979 or IS : 226-1975.
The stresses allowed in steel should conform to IS : 456-2000.
1.2.1 For under-reamed board compaction piles, the reinforcement cage shall be prepared by
welding the hoop bars to withstand the stresses during compaction process.
2 Concrete :
2.1 Materials and methods of manufacture for cement concrete shall in general be in
accordance with the method of concreting under the conditions of pile installation.
2.2 Consistency of concrete fore cast in situ piles shall be suitable to the method of installation
of piles. Concrete shall be so designed or chosen as to have homogeneous mix having a
flowable character consistent with the method of concreting under the given conditions of
pile installation. In achieving these results minor deviations in the mix proportions used in
structural concrete may be necessary.
2.3 Slump of concrete shall range between 100 mm to 150 mm for concreting in water-free
unlined boreholes. For concreting by tremie, a slump of 150 mm to 200 mm shall be
used.
2.4 In case of tremie concreting for piles of smaller diameter and depth of up to 10m, the
minimum cement content should be 350 Kg/m3 of concrete. For piles of large diameter
and / or deeper piles, the minimum cement content should be 400 kg/m3 of concrete. For
design purpose, the strength of concrete mix may be taken equivalent
M20, for concrete with cement content of 350 kg/m3 and 400 kg/m3. Where concrete of
higher strength is needed, richer concrete mix with higher cement content may be
designed. In case of piles subsequently exposed to free water or in case of piles where
concreting is done under water or drilling mud using methods other than the tremie, 10
percent extra cement over that required for the design grade of concrete at the specified
slump shall be used subject to the minimum quantities of cement specified above.
2.5 For the concrete, water and aggregates specifications laid down in IS : 456-2000 shall be
followed in general. Natural rounded shingle of appropriate size may also be used as
coarse aggregate. It helps to give high slump with less water cement ratio. For tremie
concreting aggregates having nominal size more that 20 mm should not be used.
2.6 The concrete for piles in aggressive surroundings due to presence of sulphates, etc., should
have a concrete mix of appropriate type of cement in suitable proportion.
141
CONTRACTOR NLUO
2.6.1 If the concentration of sulphates (measured as SO3) exceeds one percent in soil or 2 500
parts per million (ppm) in water a mix using 400 kg/m3 of sulphate resisting Portland
cement should be used. For soils with 0.5 to 1 percent of sulphates or ground water with 1
200 to 2 500 ppm, the mix should have 330 kg/m3 of sulphate resisting Portland cement.
For concentrations lesser than above concrete mix with 330 kg/m3 ordinary Portland
cement or 310 kg/m3 sulphate resisting should be used. In place of ordinary Portland
cement, pozzolana cement / blast furnace slag cement may be used.
2.6.2 Concentration of sulphates up to 0-2 percent in soil and 300 ppm in water may be
inconsequential.
2.7 For bored compaction piles rapid hardening cement (see 13.1.1) shall not be used. To
facilitate construction, admixtures for retarding the setting of concrete may be used.
3.0 EQUIPMENT AND ACCESSORIES :
3.1 The selection of equipment and accessories will depend upon the type of under-reamed
piles, site conditions and nature of strata. Also it will depend on economic considerations
and availability of manually or power operated equipment.
3.2 A typical list of equipment for manual construction is given in Appendix D.
3.3 Bore holes may be made by earth augers. In case of manual boring, an auger boring guide
shall be sued to keep the bores vertical or to the desired inclination and in position.
After the bore is made to the required depth, enlarging of the base shall be carried out by
means of an under-reaming tool.
3.4 In ground with high water table having unstable pile bores, boring and under-reaming
may be carried out using a suitable drilling mud. General guidelines for bentonite drilling
mud are given in Appendix E. In normally met soil strata, drilling mud can be poured from
top while boring and under-reaming can be done by normal spiral earth auger and under-
reamer. The level of drilling mud should always be about one meter above water table or
the level at which caving in occurs. In case of very unstable strata with excessive caving
in, continuous circulation of drilling mud using suitable pumping equipment and ripod,
etc. along with modified auger and under-reamer may be used.
3.5 Sometimes permeable strata overlying a rim clayey stratum may be cased and normal
boring and under-reaming operation may be carried out in clayey stratum.
3.6 To avoid irregular shape and widening of bore hole in very loose strata at top, a casing
pipe of suitable length may be used temporarily during boring and concreting.
3.7 For improved control over the inclination of batter piles, a tripod hoist with fixed pully
should be used for lowering in of under-reaming tools.
3.8 For placing the concrete in bore holes full of drilling mud or subsoil water, tremie pipe of
not less than 150 mm diameter with flap valve at the bottom should be used.
3.9 For batter under-reamed piles, the reinforcement cage should be placed guiding it by a
chute or any other suitable method. If concreting is not done by tremie, it should be done
by chute.
142
CONTRACTOR NLUO
3.10 In under-reamed compaction piles, suitable devices should be used for guiding the
movement of drop weight and specified core assembly for its vertical driving. For
operating the drop weights of adequate capacity, suitable winch with hoisting attachment
should be used.
4.0 CONSTRUCTION :
4.1 Under-reamed piles may be constructed by selecting suitable installation techniques at a
given site depending on subsoil strata conditions and type of under-reamed pile and
number of bulbs.
4.2 In construction with the equipment given in 6, initially boring guide is fixed with its
lower frame levelled for making desired angular adjustment for piles at batter. Boring is
done up to required depth and under-reaming is completed.
4.2.1 In order to achieve proper under-reamed bulb, the depth of bore hole should be checked
before starting under-reaming. It should also be checked during under-reaming and any
extra soil at the bottom of bore hole reamed by auger before reinserting the under-reaming
tool.
4.2.2 The completion of desired under-reamed bulb is ascertained by (a) the vertical movement
of the handle, and (b) when no further soil is cut.
4.2.3 In double or multi-under-reamed piles, boring is first completed to the depth required for
the first (top) under-ream only and after completing the under-reaming, boring is extended
further for the second under-ream and the process is repeated.
4.3 Control of Alignment :
The piles shall be installed as correctly as possible at the correct location and truly vertical
(or at the specified batter).Grate care shall be exercised in respect of single pile or piles in
two-pile groups under a column. As a guide, for vertical piles a deviation of 1.5 percent
and for raker piles a deviation of 4 percent shall not normally be exceeded. In special
cases, a closer tolerance may be necessary. Piles shall not deiate more than 75 mm or one
quarter the stem diameter, whichever is less (75 mm or D/10 whichever is more in case of
piles having diameter more than 600 mm) from the designed position at the working level.
In the case of single pile under a column, the positional deviation should not be more that
50 mm or one quarter of the stem diameter whichever is less (100 mm in case of piles
having diameter more than 600 mm). For piles where cut-off is at substantial depths, the
design should provide for the worst combination of the above tolerances in position and
inclination.
In case of piles deviating beyond these limits, corrective measures where necessary may
be taken in the form of increasing pile size, provision of extra reinforcement in the pile,
redesign of pile cap and pile ties. If the resulting eccentricity cannot be taken care of by
the above measures, the piles should be replaced or supplemented by one or more
additional piles.
NOTE : In case of raker piles up to a rake of 1 in 6, there may be no reduction in
the capacity of the pile unless otherwise stated.
143
CONTRACTOR NLUO
4.4 Concreting shall be done as soon as possible after completing the pile bore. The bore hole
full of drilling mud should not be left unconcreted for more than 12 to 24 hours depending
upon the stability of bore hole.
15.5 For placing concrete in pile bores, a funnel should be used and method of concreting
should be such that the entire volume of the pile bore is filled up without the formations of
voids and / or mixing of soil and drilling fluid in the concrete.
15.5.1 In empty bore holes for under-reamed piles a small quantity of concrete is pourd to give
about a 100 mm layer of concrete at the bottom. Reinforcement is lowered next and
positioned correctly. Then concrete is poured to fill up the bore hole. Care should be taken
that soil is not scrapped from sides if rodding is done for compaction. Vibrators shall not
be used.
15.5.2 If the water is confined up to the bucket length portion at the toe and seepage is low, the
water should be bailed out and concreting should be done as in 15.5.1.
15.5.3 In case the pile bore is stabilized with drilling mud or by maintaining water head within
the bore hole, the bottom of bore hole shall be carefully cleaned by flushing it with fresh
drilling mud, and pile bore will be checked for its depth immediately before concreting.
Concreting shall be done by tremie method. The tremie should have a valve at its bottom
and lowered with its valve closed at the start and filled up with concrete. The valve is then
opened to permit the flow of concrete which permits the upwards displacement of drilling
mud. The pouring should be continuous and tremie is gradually lifted up such that the
tremie pipe opening remains always in the concrete. If the final stage the quantity of
concrete in tremie should be enough so that on final withdrawal some concrete spills over
the ground.
NOTES :
1. The concrete should be coherent, rich in cement (not less than 350 kgf/m3) and of slump
not less than 150 mm.
2. The tremie pipe should always penetrate well into the concrete with an adequate margin
of safety against accidental withdrawal of the pipe is surged to discharge the concrete.
3. The pile should be concreted wholly by tremie and the method of deposition should not
be changed part way up the pile, to prevent the laitance from being entrapped within the
pile.
4. All tremie tubes should be scrupulously cleaned before and after use.
5. Normally concreting of the piles should be uninterrupted. In the exceptional case of
interruption of concreting, but which can be resumed within 1 or 2 hours, the tremie shall
not be taken out of the concrete. Instead it shall be raised and lowered slowly, from time
to time to prevent the concrete around the tremie from setting. Concreting should be
resumed by introducing a little richer concrete with a slump of about 200 mm for easy
displacement of the partly set concrete. If the concreting cannot be resumed before final
set-up of concrete already placed, the pile so cast may be rejected, or used with
modifications.
144
CONTRACTOR NLUO
6. In case of withdrawal of tremie o0ut of the concrete, either accidentally or to remove a
choke in the tremie, the tremie may be re-introduced in a manner to prevent
impregnation of laitance or scum lying on the top of the concrete already deposited in the
bore.
15.5.4 In inclined piles, the concreting should be done through achute or by tremie method.
15.5.5 For under-reamed bore compaction piles, the pile bore is first filled up without placing
any reinforcement. Concreting is done as in 15.5.1 depending upon situation. Soon after
the specified core assembly shall be driven and extra concrete shall be poured in
simultaneously to keep the level of concrete up to ground level. If hollow driving pipe is
used in core assembly, the pipe shall be withdrawn after filling it with fresh concrete
which will be left behind.
NOTE :In under-reamed bored compaction pile, concreting should be uninterrupted and
notes (5) and (6) under clause 15.5.3.
15.5.6 The top of concrete in a pile shall be brought above the cut-off level to permit removal of
all laitance and weak concrete before capping and to ensure good concrete at the cut-off
level for proper embedment into the pile cap.
15.5.7 Where cut-off level is less than 1.5 metre below working level, concrete shall be cast to a
minimum of 300 mm above cut-off level. For each additional 0.3 m increase in cut-off
level below working level, additional coverage of 50 mm minimum shall be allowed.
Higher allowance may be necessary depending on the length of the pile. When concrete
is placed by tremie method, it shall be cast to the piling platform level to permit overflow
of concrete for visual inspection or to a minimum of one metre above cut-off level. In the
circumstance where cut-off level is below ground water, the need to maintain a pressure
on the unset concrete equal to or greater than water pressure should be observed and
accordingly length of extra concrete above cut-off level shall be determined.
15.5.8 Defective Pile : In case, defective piles are formed, they shall be removed or left in
place whichever is convenient without affecting performance of the adjacent piles or the
cap as a whole. Additional piles shall be provided to replace them as directed.
15.5.9 Any deviation from the designed location alignment or load capacity of any pile shall be
noted and adequate measures taken well before the concreting of the pile cap and plinth
beam if the deviations are beyond the permissible limit.
145
CONTRACTOR NLUO
APPENDIX - D
REQIPMENT FOR UNDER-REAMED PILES
(MANUAL CONSTRUCTION)
D-1 EQUIPMENT
D-1.1 Normally the following equipment will be required in manual operation :
(a) An auger
(b) An under-reamed
(c) A boring guide ; and
(d) Accessories like spare extensions, cutting tool, concreting funnel, etc.
D-1.1.1 For the piles of size larger than 30 cm and for larger depths additional
equipment required will be a portable tripod hoist with a manually operated
which.
D-1.1.2 For piles in high ground water table and unstable soil conditions, boring and
under-reaming, shall be carried out with bentonite slurry using suitable
equipment. Tremie pipe shall be used for concreting.
D-1.1.3 The additional equipment normally required for under-reamed compaction
pile are the following :
(a) Drop weight for driving the core assembly, and
(b) Pipe or solid core.
146
CONTRACTOR NLUO
APPENDIX - E
BASIC PROPERTIES OF DRILLING MUD (BENTONITE)
E-1 PROPERTIES :
E-1.1 The bentonite suspension used in bore holes is basically a clay of montmorillonite group
having exchangeable sodium cations. Because of the presence of medium cations,
bentonite on dispersion will break down into small plate like particles having a negative
charge on the surfaces and positive charge on the edges. When the dispersion is left to
stand un-disturbed, the particles become oriented building up a mechanical structure of
its own, the mechanical structure held by electrical bonds is observable as a jelly like
mass or jell material. When the jell is agitated, the weak electrical bonds are broken and
the dispersion becomes fluid.
E-2 FUNCTIONS :
E.2.1 The action of bentonite in stabilizing the sides of bore holes primarily due to the
thixotropic property of bentonite suspensions. The thixotropic property of bentonite
suspension permits the material to have the consistency of a fluid when introduced into
the excavation and when undisturbed forms a jelly which when agitated becomes a fluid
again.
E-2.2 In the case of a granular soil, the bentonite suspension penetrates into the sides under
positive pressure and after a while forms a jelly. The bentonite suspension gets deposited
on the sides of the hole and makes the surface impervious and imparts a plastering effect.
In impervious clay, the bentonite does not penetrate into the soil, but deposits only a this
film on the surface of the hole. Under such conditions, stability is derived from the
hydro-static head of the suspension.
E-3 SPECIFICATION :
E-3.1 The bentonite suspension used for piling work shall satisfy the following requirements :
(a) The liquid limit of bentonite when tested in accordance with IS : 2720)
(Part V) - 1965 shall be more than 300 percent and less the 450 percent.
(b) The sand content of the bentonite powder shall not be greater than 7
percent.
NOTE : The purpose of limiting the sand content is mainly to control and reduce the
wear and tear of the pumping equipment.
(c) Bentonite solution should be made by mixing it with fresh water using
pump for circulation. The relative density of the bentonite solution should be
between 1.034 and 1.10.
(d) The differential free swell shall be more than 540 percent.
147
CONTRACTOR NLUO
F-1 : LOAD TEST ON PILES
F-1 These would be conducted on piles on completion of 28 days after casting.
Two types of namely initial and routine tests, for each type of loading viz. Vertical,
horizontal (lateral) pull out, are performed on piles.
F-1.1 :Initial Tests
This test shall be performed to confirm the design load calculations and to provide
guidelines for setting up the limits of acceptance for routine tests. It also gives an idea of
the suitability of the piling system.
Initial test on pile are to be carried out at one or more location depending on the No. of
piles required.
Load applied for the initial (cyclic) load test shall be 2.5 times the safe carrying capacity
of the pile.
Loading for initial tests shall be conducted as per IS-2911 part IV.
F-1.2 : Routine Tests
Selection of piles for the Routine test shall be done by the Engineer subject to a maximum
of ½% of total No. piles required. The No. of tests may be increased to 2% depending on
the nature / type of structure.
The test load applied shall be 1.5 times the safe carrying capacity of the pile.
The maintained load method as per IS-2911(part IV) 1985 shall be followed for loading
for the Routine Tests.
This test will be performed for the following purposes:
a) To ensure the safe load capacity of piles.
b) Diction of any unusual performance contrary to the findings of the initial test.
F-1.3: The tests shall be performed at the cut- off level only
F-1.4: The contractor shall submit a detailed report for the test result in duplicate to client/
consultant.
F-1.5: Vertical; Load Tests
This test will be carried out as stipulated in IS-2911 (PART iv) 1995.
Pile Head: The pile shall be chipped off till sound concrete is met wherever
applicable. The reinforcement shall be cut and head leveled with plaster of Paris. A
bearing plate with a hole shall be placed on the head for the jack to rest.
Reaction: Kent ledge shall be suitably designed to get the desire reaction on the
piles. Anchor piles (if required) shall be placed at a centre distance of 3 time the pile
diameter subject to a minimum distance of 2 M.
148
CONTRACTOR NLUO
Settlement: 2 dial gauged for a single pile and 4 dial gauges for a group of piles
with 0.01 mm sensitivity shall be used. They shall be positioned at equal distance
around the piles on datum bars resting on immovable supports at a distance of 3 D (min.
of 1.5 m ) where D is the diameter of pile or circumscribing circle for non-circular piles.
Application of load: It shall be applied as specified depending on the type of test
(routine/ initial). Each load shall be maintained till the rate of displacement of the pile
top is either 0.1 mm in the first 30minutes or 0.2 mm in the first one hour or 2 hours
whichever occurs first. The next increment in the load shall be applied on achieving the
aforesaid criterion.
The test load shall be maintained for 24 hours.
Initial Test: The safe load on a single pile shall be the least of the following:
(i) 2/3rd of the final load at which the total displacement attains a value of 12 mm
unless otherwise required in a given case on the basis of nature and type of
structure in which case, the safe load should be corresponding to the stated total
displacement permissible.
(ii) 50% of the final load at which the total displacement equals 10% of the pile
diameter in case of uniform diameter piles or 7.5 % of the bulb diameter in case
of under reamed piles.
Routine Tests - Acceptance
The maximum settlement at test load should not exceed 12 mm.
F-1.6 Lateral Load Test:
The jack should be placed horizontally, between two piles. The load on the jack shall
be the same on both the piles. The load will be applied in increments of 20% of the
estimated safe load and at the cut off level. The load will be increased after the
rate of displacement is nearer to 0.1 mm per 30minutes. If the cut-off level is
approachable, one dial gauge exactly at the cut – off level shall measure the
displacement. In case the cut-off level is not approachable, 2 dial gauges 30cms. Apart
vertically, shall be set up and the lateral displacement of the cut –off level calculated by
similar triangles.
The safe load on the pile shall be the least of the following:
a) 50% of the final load at which the total displacement increases to 12 mm.
b) Final load at which the total displacement corresponds to 5 mm.
F-1.7 Pull out Tests
A suitable set up shall be designed to provide an uplift force to the piles. The load
increments and the consequent displacements shall be as per the case of a vertical load
test.
The safe load shall be the least of the following:
a) 2/3rd of the load at which the total displacement is 12 mm or the load corresponding to a
specified permissible lift.
b) Half of the load at which the load displacement curve shows a clear break.
149
CONTRACTOR NLUO
SECTION - XIII
BRIEF TECHNICAL SPECIFICATION FOR ROAD WORKS AS PER
MORT&H GUIDELINES (FOURTH REVISION)
1. CLEARING AND GRUBBING (MORT&H CLAUSE NO. 201)
This work shall consist of cutting, removing and disposing of all materials such as trees,
bushes, shrubs, stumps, roots, weeds, top organic soil not exceeding 150 mm in thickness,
rubbish etc., which in the opinion of the Engineer-in-Charge are unsuitable for use in the
works from the area of road land containing road embankment, drains, cross drainage
works/structures and such other areas as may be specified on the drawings or by the
engineers. It shall include necessary excavation, back filling of pile resulting from
uprooting of trees and stumps to required compaction, handling, salvaging and disposal of
cleaned materials, clearing and grubbing shall be performed in advance of earthwork
operations.
Measurement for Payment
Clearing and grubbing for road embankments, drain and cross drainage structures shall
be measured on area basis in terms of hectares. Clearing and grubbing of borrow areas
shall be deemed to be a part of works preparatory to embankment construction. No
separate payment shall be made for the same. Cutting of trees up to 300 mm in girth
including removal of stumps and roots and trimming of branches of trees of extending
above the roadway shall be considered incidental to the clearing & grubbing work.
For cutting of trees, the girth shall be measured at a height of 1 m above ground level or
at the top of the stump if the height of the stump is less than one meter. The cutting of
trees measured in numbers as given below :
(i) Above 300 mm to 600 mm girth
(ii) Above 600 mm to 900 mm girth
(iii) Above 900 mm to 1800 mm girth
(iv) Above 1800 mm girth
2. ROADWAY EXCAVATION OF DRAIN (MORT&H CLAUSE NO. 301 TO 304)
The work shall consists of excavation, removal and disposal of all materials necessary for
construction of road ways, side drains and waterways as per line, grade and cross-section
shown in the drawings or as indicated by the Engineer-in-Charge. The work include the
hauling & staking of or hauling to sites of embankment and subgrade construction, also
disposable of unsuitable cut material, trimming and finishing of the road to specified
dimensions.
All the materials involved in excavation shall be classified as
a. Ordinary Soil
b. Soft Rock and
c. Hard Rock
150
CONTRACTOR NLUO
a. Ordinary Soil
This shall mean removal of top soil, turf, sand, silt, loam, clay, mud, peat, black
cotton soil, soft shale or loose moorum, a mixture if these and all similar
materials which needs ordinary application of pick, spade or shovel and ordinary
digging equipment. Removal of gravel or any other material having dimension in
any direction not exceeding 75 mm shall be covered under soil.
b. Soft Rock (Not Requiring Blasting)
This shall include
(i) Rock type such as laterite, shales and conglomerates, varieties of lime
stone etc. which may require crow bars also requiring blasting in dry
condition but when wet, becomes soft and manageable by means other
than blasting.
(ii) Macadam surfaces such as water bound and bituminous/tar bound, soling
of roads, paths etc., hard core, compact moorum or stablised soil which
require grafting tools or pick or both and shovel, gravel and cobble stone
having maximum dimension in any one direction between 75 mm and
300mm.
(iii) Lime concrete, stone masonry in lime mortars and brick work in
lime/cement mortar below ground level, RCC work broken by crow bars
etc.
(iv) Boulders which do not require blasting having maximum dimension in
any direction of more than 300 mm found lying loose on surface or
embedded in river bed, soil etc.
c. Hard Rock (Requiring Blasting)
This shall comprise
(i) Any rock or cement concrete, which require use of mechanical plant and /
or blasting if required.
(ii) Reinforced concrete below ground level.
(iii) Boulders requiring blasting.
d. Hard Rock (Blasting Prohibited)
Hard rock which needs blasting but due to other reason blasting prohibited,
excavation has to be carried out but chiseling, wedging or any other agreed
method.
e. Marshy Soil
This shall include soils like soft clays and peats, excavated below the original
ground level of marshal and swamps and soil excavated from other areas
requiring continuous pumping or boiling of water.
The classification of excavation shall be decided by the Engineer and decision
shall be final and binding on contractor.
If the hard rock encountered in road excavation them it shall be removed up to
formation level or otherwise as per drawings. However unstable shales or other
151
CONTRACTOR NLUO
unsuitable materials encountered at the formation level, these shall be removed to
the extent of 500 m below formation level or as required. Rocks and large
boulders which are likely to cause differential settlement and also local problem
should be removed to the extent of 500 mm below the formation level in full
width including drains and cut through the side drains.
Dewatering
If the water encountered during the excavation, the same shall be dewatered by any
suitable methods and the work place shall be kept dry at the time of working. The
cost of the same is included in his price.
Disposal of Excavated Materials
All the suitable excavated materials shall be used in the embankment land scapping
etc. Other unsuitable material are to be disposed at a distance of about 1000 m
including all lifts with no extra cost.
Measurement of Payment
Excavation of roadway material shall be measured by taking cross section at
suitable intervals in the original position before work starts and after its
completion and computing the volumes in Cum.
3. CONSTRUCTION OF EMBANKMENTWITH APPROVED MATERIAL
(MORT&H CLAUSE NO. 305) WITH ALL LEADS & LIFTS
This specification shall apply to the construction of embankment, subgrade, earthen
shoulder and miscellaneous back fill etc. All the work shall be true to line, grade and as
per drawings.
Materials and General Requirements
The materials such as earth, moorum, gravel, a mixture of all these shall be free of logs,
stumps, roots, rubbish or any other ingredient likely to detoriate or affect the stability of
the embankment.
The size of the course material in the mixture of earth shall ordinarily not exceed 75
mm when being placed on embankment and 50 mm when placed in the subgrade.
Density Requirement of Embankment and Subgrade Materials
Sl. Maximum Laboratory Dry
TYPE OF WORK
No. Unit Weight when Tested as
per IS:2720 (Part –8)
1. Embankment upto 3 m height not subject to Not less than 15.2 kN/Cu.m
extensive flooding.
2. Embankment exceeding 3 m height or Not less than 16.0 kN/Cu.m
Embankmen tof any height subject to long
152
CONTRACTOR NLUO
period in undulation.
3. Subgrade and earthen shoulder / verger / Not less than 17.5 kN/Cu.m
backfill
The material to be used in subgrade should also satisfy design CBR at the dry unit
weight.
General Requirement
Before the work starts, the borrow area to be designated by the client. In case any borrow
area is not designated earlier, time to time clearance to be obtained from all the statutory
bodies by the contractor. Borrow pit along the road is discouraged. If permitted these shall
not be dug continuously. Ridge of not less then 8 m width should be left at interval of not
exceeding 300 m.
The contractor shall obtain representative sample from each of the identified borrow
areas and have these tested in approved laboratory.
Compaction Requirement for Embankmentand Subgrade Construction
Sl. Relative compaction as % of
TYPE OF WORK/MATERIAL
No. Maximum Laboratory Dry Density
as per IS:2720 (Part 8)
1. Embankment Not less than 95
2. Subgrade and earthen shoulders Not less than 97
3. Expensive Clay
a. Sub-grade and 500 m portion Not allowed
just below the subgrade.
b. Remaining portion of Not less than 90
embankment
The contractor shall submit the following to the approval of engineer before
commencement of work.
(i) The value of maximum dry density and optimum moisture content in accordance
with IS 2720 (Part 7) or (Part 8) as the case may be.
(ii) A graph of density plotted against moisture content from which each of the
values in (i) above maximum dry density and optimum moisture content were
determined.
(iii) The dry density - moisture content - CBR relationship for light, intermediate and
heavy comparative effects for each of the earth fill materials he intends to use.
Once the above information is approved, it shall form the basis for compaction.
Construction Operation
The Embankment/ subgrade shall be built sufficient wider than the design dimension so
that surplus materials may be trimmed, ensuring desired density is available in the
153
CONTRACTOR NLUO
Embankment slope. Where necessary, the original ground may be levelled to facilitate
placement of 1st layer of embankment, mixed with water and then compacted by rolling
so as to achieve minimum dry density.
In case when the difference between the subgrade level (top of the subgrade on which
pavement rests) and ground level less than 500 mm and the ground does not have 97
percent compaction with respect to dry density, the ground shall be loosened up to a
level of 500 mm below subgrade level, watered and compacted to get not less than 97 %
compaction.
The Embankment& sub-grade material shall be spread in layers of uniform thickness not
exceeding 200mm compacted thickness over the entire width by mechanical means.
Successive layers shall not be placed unless the previous layer thoroughly compacted.
Moisture content of each layer of soil shall be checked in accordance to IS 2720 (pt-2),
shall be adjusted after allowing evaporation losses.
The compaction shall be done with the layers of vibratory rollers of 80KN to 100KN
static weight with plain or pad foot drum (or) heavy pneumatic tyred roller.
When any soft areas occurred in embankment/sub-grade shoulder the some shall be
compacted further to active required compaction. Inspite of that the specified
compaction not achieved. The contractor shall remove the soft material and filled with
approved material with the satisfaction of Engineer without extra cost. The surface of the
embankment/subgrade shall be maintained all the times free from water
logging/pounding.
Earth work for widening existing road embankment.
When the existing Embankment is widened and its slopes are steeper than 1:4, continuos
horizontal benches, each at least 300mm wide shall be cut into the old surface ensuring
good bond with the fresh earth. The material obtained from cutting the benching can be
used in Embankment construction.
Earthwork over existing road surface :
Embankment is placed over an existing road surface, the work shall be carried out as
indicated below :
i) If the existing road surface is of granular or bituminous type and lies within 1m
of the near subgrade land the same shall be scarified to a depth of 50mm or more
if specified so as to provide ample bond between old and new materials ensuring
at least 500mm portion below the top of new subgrade level is compacted to the
desired density.
ii) If the existing road surface is of cement concrete type and lies within 1m of the
road new subgrade level the same shall be removed completely.
iii) If the level difference between the existing road surface and new formation level
is more than 1m the existing surface shall be permitted to stay in place without
any modification.
154
CONTRACTOR NLUO
Measurement of payment :
Earth Embankment/ subgrade construction shall be measured separately by taking cross-
sections at intervals in the original position before work starts and after its completion
and computing the volumes in Cu.m by method of average end areas.
4. GRANULAR SUBBASE (MORT&H CLAUSE 401)
The work shall consists of laying & compacting well graded material on prepared
subgrade in accordance with the requirements of these specifications. The material shall
be laid in one or more layers as lower sub-base and upper sub-base.
Materials :
The materials shall be natural sand, moorum, gravel, crushed stone or combination these
of depending up on grading required. The material shall be free from organic or other
deleterious constituents. Materials like crushed slag, crushed concrete, brick metal &
kankar may be allowed only with specific approval of Engineer.
Grading for coarse graded Granualr sub-base Materials :
Percent by weight passing the IS sieve
Grading-I Grading-II Grading-III
IS SIEVE
DESIGNATION
100 - -
75.0 MM
- 100 -
53.0 MM
55-75 50-80 100
26.5 MM
- - -
9.5 MM
10-35 15-30 25-45
4.75 MM
2.36 mm - - -
155
CONTRACTOR NLUO
- - -
0.425 MM
<10 <10 <10
0.075 MM
30 25 20
CBR VALUE
(MINIMUM)
The material passing 425 micron (0.425mm) sieve for all the gradings when tested
according to IS : 2720 (Part-5) shall have liquid limit and plasticity index not more than
25 and 6% respectively.
When the sub-base materials consist of combination of materials mentioned, mixing
shall be done mechanically by the mix-in-place method. Manual mixing is permitted
only width of laying is not adequate for mech. operations.
For a compacted single layer upto 225mm the compaction shall be done with the
help of vibratory roller. The rolling shall be done from edge to center of the road.
Each parts of the roller shall uniformly over lays not less than 1/3 of the track made
in the preceding pass. The speed of the roller shall not exceed 5km/hr.
Measurement for Payments :
Granular sub-base shall be measured as finished work in position in Cu.m.
5. CONSTRUCTION OF WATER BOUND MACADAM (MORT&H CLAUSE
404)
This work shall consist of clean, crushed aggregates mechanically interlocked by rolling
and bonding together with screening binding material where necessary and water laid on
properly prepared sub-grade/sub-base/base of existing pavement.
Materials
Coarse aggregates : This shall be either crushed or broken stone, crushed slag etc.
Physical requirements of coarse aggregate for Water Bound Macadam for sub-
base/base course :
156
CONTRACTOR NLUO
Test Method Requirements
SL.N TEST
O.
40% max
30% max
1. LOS ANGELES ABRASION IS: 2386 PT (4)
IS :2386 pt (4)
VALUE* (OR) AGGREGATE
or IS : 5640 pt (1)**
IMPACT VALUE
30 % max
2. ***COMBINED FLAKINESS IS : 2386 PT (1)
AND ELONGATION INDICES
(TOTAL)
* Aggregate may satisfy either of the two requirements
** Aggregate like brick metal, kankar, laterite etc. which get softened in presence
of water shall be tested for impact value under wet conditions in accordance with
IS:5640.
*** The requirement of flakiness index and elongation index shall be enforced only
in the case of crushed broken stone and crushed slag.
157
CONTRACTOR NLUO
Grading Requirements of coarse Aggregates :
IS Sieve Percentage by wt.
Designation Passing the IS Sieve
GRADING SIZE RANGE
90.0 mm 100
II 63 MM TO 45 MM
63.0 mm 90-100
53.0 mm 25-75
45.0 mm 0-15
22.4 mm 0-5
63.0 mm 100
III 53 MM TO 22.4
MM
53.0 mm 95-100
45.0 mm 65-90
22.4 mm 0 – 10
11.2 mm 0–5
The compacted layer thickness for grade II & III shall be 75mm.
SCREENINGS
The screenings to fill voids in the coarse aggregate shall generally consists of the same
materials as the coarse aggregate.
158
CONTRACTOR NLUO
GRADING FOR SCREENINGS
IS Sieve Percentage by wt. Passing
Designation the IS Sieve
GRADING SIZE OF
Classification
SCREENING
11.20 mm 100
„B‟ 11.2MM
5.60 mm 90-100
180 micron 15-35
Approximate quantities of coarse aggregate and screenings required for 75mm compacted
thickness of WBM coarse for 10m squire areas.
Classification Size/ Compacted Loose
SCREENING
Range thickness Qty.
Grading For WBM
Classification (Loose
Qty.)
Grade-II 63mm to 75mm 0.91 to Type B 0.2 to
45mm 1.07 11.2 mm 0.22 Cu.m
m3
Grade-III 53mm to 75mm -do- -do- 0.18 to
22.4mm 0.21 Cu.m
Building Materials :
Building material as a filler materials having a Plasticity Index (PI) value less than 6 as per
ID 2720 (Pt -5).
The quantity of binding materials for a compacted thickness of 75mm will be 0.06-
0.09mm cub/10 Sq.m.
Spreading coarse aggregates :
The coarse aggregate shall be spread uniformly and evenly upon the prepared sub-grade /
sub-base / base to proper profile by using templates placed across the road about 6.0m
apart.
Rolling :
Immediately following the separating of the coarse aggregate rolling shall be done with
three wheeled power rollers of 80 to 100kn capacity. Rolling shall be stopped when
aggregate are partially compacted. Screenings are spread to fill the voids within the
aggregate.
159
CONTRACTOR NLUO
Application of binding materials :
After the application of screenings binding materials shall be spread and rolled with
water. The rolling operation shall continue until the resulting slurry after filling of voids.
6. WET MIX MACADAM (SUB-BASE) MORT&H CLAUSE NO. 406)
This work shall consist of laying and compacting clean, crushed, graded aggregate
granular material with water to a dense mass on a prepared subgrade / sub-base or
existing pavement as the case may be. The material shall be laid in one or more layers as
necessary to lines, grades and cross section drawings.
The thickness of a single compacted wet mix macadam layer shall not be less than 75
mm. When vibrating or other approved types of compacting equipment are used, the
compacted depth of a single layer of the sub-base course may be increased to 200 mm.
Materials
Coarse aggregate shall be stone crushed. The aggregate shall conform to the physical
requirement as given below
Grading Requirements of Aggregates for Wet Mix Macadam
IS Sieve Designation
PERCENT BY WEIGHT PASSING
THE IS SIEVE
53.0 mm
100
45.0 mm
95 – 100
26.5 mm
-
22.4 mm
60 – 80
11.2 mm
40 – 60
04.75 mm
25 – 40
02.36 mm
15 – 30
600 micron
8 – 22
75 micron
0–8
Materials finer than 425 micron shall have plasticity Index (PI) not exceeding 6 (six).
Physical Requirement of Coarse Aggregate for Wet Mix Macadam
Test
TEST METHOD REQUIREMENTS
1. * Los Angeles Abrasion Value (or)
IS : 2386 PT – 4 40 PERCENT
Aggregate Impact Value
IS : 2386 Pt – 4
(MAX.)
or IS : 5640
30 percent (Max)
160
CONTRACTOR NLUO
2. Combined flakiness and elongation
IS : 2386 PT – 1 **
indices (Total)
30 percent (Max.)
* Aggregate may satisfy requirement of either of the two tests.
** To determine this combined proportion, the flaky stone from a representative
sample should first be separated out. Flakiness index is weight of flaky stone
metal divided by weight of stone samples. Only the elongated particle be
separated out from the remaining (non-flaky) stone metal. Elongation index is
weight of elongated particles divided by total non-flaky particles. The value of
flakiness index and elongation index so found are added up.
If the water absorption value of the coarse aggregate is grater then 2 %, the
soundness test shall be carried out on the material delivered to site as per IS:2386
(Pt-5).
Construction Operation
Wet mix shall be prepared in on approved mixing plant of suitable capacity having
provision of controlled addition of water and forced / positive mixing arrangement like
pug mill or pan type mixer of concrete batching plant.
Optimum moisture for mixing shall be determined and accordance with IS:2720 (Pt-8)
while adding water, due allowance should be made for evaporation.
Immediately after mixing, the aggregate shall be spread uniformly and evenly upon the
prepared sub-grade.
The mix may be spread either by a paver finisher or motor grader. After the mix has been
laid to the required thickness grade and cross fall/can be the same shall be uniformly
compacted, to the full depth with suitable roller. The compaction shall be done up to
200mm thick with vibrating roller. The speed of the roller shall not exceed 5KMPH.
Rolling shall be continued with the density achieved is at least 98% of the maximum dry
density for the material as determined by the method outlined in IS : 2720 (Pt-8).
After final compaction of wet mix macadam the road shall be allowed to dry for 24
hours. Preferably no vehicular traffic of any kind should be allowed to the finished wet
mix macadam surface till it has dried and the wearing course laid.
Measurement
Wet mix macadam shall be measured as finished work in position in Cu.m
7. CONSTRUCTION OF SHOULDERS, ISLANDS, & MEDIAN (CLAUSE 407 OF
MORT&H.)
The work shall consist of constructing shoulder (hard/paved/earthen) on either side of
the pavement.
Materials
Shoulder on either side of the road may be of selected earth/granular material.
161
CONTRACTOR NLUO
Construction Operations :
The sequence of operations shall be such that the construction of panel shoulder is done
in layers each matching the thickness of adjoining pavement layer. Only after a layer of
pavement and corresponding layer in paved and earth shoulder portion have been laid
and compacted, the construction of next layer of pavement & shoulder shall be taken up.
Where the materials in adjacent layers are different, these shall be laid together and the
pavement layer shall be compacted first. The corresponding layer in paved shoulder
portion shall be compacted, therefore, which shall be followed by compaction of earth
shoulder layer. Under no circumstances, box cutting shall be done for construction of
shoulders.
Measurements
i. for excavation in Cu.m.
ii. for earthwork/granular fill in Cu.m.
8. CONSTRUCTION OF BITUMINOUS COURSES
Prime coat over granular base (Clause 502)
Scope
This work shall consist of the application of a single coat of low viscosity liquid
bituminous material to a porous granular surface preparatory to the superimposition of
bituminous treatment or mix.
Materials
Primer
The choice of a bituminous primer shall depend upon porosity characteristics of the
surface to be primed as classified in IRC : 16. These are
(i) Surface of low porosity; such as Wet Mix Macadam and Water Bound Macadam.
(ii) Surface of medium porosity; such as cement stabilised soil base.
(iii) Surface of high porosity; such as a gravel base.
Primer Viscosity
The type and viscosity of the primer shall comply with requirements of IS 8887, as
sampled and tested for bituminous primer in accordance with these standards. Guidance
on viscosity and rate of spray is given.
162
CONTRACTOR NLUO
Viscosity requirement and quantity of Liquid Bituminous Primer
Type of Surface
KINEMATIC VISCOSITY QUANTITY OF LIQUID
0
OF PRIMER AT 60 C BITUMINOUS
(CENTISTOKES) MATERIAL PER 10 M2
(KG)
Low porosity 30 – 60 6 to 9
Medium porosity 70 – 140 9 to 12
High porosity 250 – 500 12 to 15
Bituminous primer shall not be applied to a wet surface (see 502.4.2) or during a dust
storm or when the weather is foggy, rainy or windy or when the temperature in the shade
is less than 100C. Surface which are to receive emulsion primer should be damp, but no
free or standing water shall be present.
Immediately prior to applying the primer the surface shall be carefully swept clean of
dust and loose particles, care being taken not to disturb the interlocked aggregate. This is
best achieved when the surface layer is slightly moist (lightly sprayed with water and the
surface allowed to dry) and the surface should be kept moist until the primer is applied.
A primed surface shall be allowed to cure for at least 24 hours or such other period as is
found to be necessary to allow all the volatiles to evaporate before any subsequent
surface treatment or mix is laid. Any unabsorbed primer shall first be blotted with an
application of sand, using the minimum quantity possible. A primed surface shall not be
opened to traffic other than that necessary to lay the next course. A very thin layer of
clean sand may be applied to the surface of the primer, to prevent the primer picking up
under the wheels of the paver and the trucks delivering bituminous material to the paver.
Primer coat shall be measured in terms of surface area of application in square metres.
9. TACK COAT . This work shall consist of the application of a single coat of low viscosity
liquid bituminous material to an existing bituminous road surface preparatory to the
superimposition of a bituminous mix, when specified in the contract or instructed by the
engineer.
The tack coat distributor shall be a self propelled or towed bitumen pressure sprayer,
equipped for spraying the material uniformly at a specified rate. Hand spraying of small
area, inaccessible to the distributor, or in narrow strips, shall be sprayed with pressure
hand sprayer.
Application of Tack Coat
The application of tack coat shall be at the rate specified in the contractor, and shall be
applied uniformly. If rate of application of Tack coat is not specified in the contract then
it shall be at the rate specified as per table given below. The normal range of spraying
temperature for a bituminous emulsion shall be 200 C to 700C and for a cutback, 500C to
800C if RC-70/MC-70 is used.
163
CONTRACTOR NLUO
Sl.No.
TYPE OF SURFACE QUANTITY OF LIQUID
BITUMINOUS MATERIAL
PER KG PER M2 AREA
i. Normal bituminous surface 0.20 to 0.25
ii. Dry and hungry bituminous surfaces 0.25 to 0.30
iii. Granular surfaces treated with primer 0.25 to 0.30
iv. Non bituminous surfaces
a. Granular base (not primed) 0.35 to 0.40
b. Cement concrete pavement 0.30 to 0.35
Curing of Tack Coat
The tack coat shall be left to cure until the volatiles have evaporated before any
subsequent construction is started. No plant or vehicles shall be allowed on the tack coat
other than those essential for the construction.
Tack coat shall be measured in terms of surface area of application in square metres.
10. BUILT-UP SPRAY GROUT AS PER CLAUSE NO. 506
This work shall consist of a two layer composite construction of compacted crushed
coarse aggregate with application of bituminous binder after each layer, and with key
aggregates placed on top of the second layer, in accordance with the requirements of
these specifications, to serve as a base course and in conformity with the lines, grades
and cross-section shown on the drawings or as directed by the Engineer. The thickness of
the course shall be 75 mm.
Built up spray grout shall be used in a single course in a pavement structure.
Aggregates
The coarse aggregate shall consists of crushed rock, crushed gravel or other hard
material retained on the 2.36mm sieve.
The aggregate shall satisfy the physical requirements set out in Table. The coarse and
key aggregates for built-up spray grout shall conform to the grading given below.
IS Sieve Designation
CUMULATIVE PER CENT BY WEIGHT OF
(mm)
TOTAL AGGREGATE A PASSING
COARSE KEY AGGREGATE
AGGREGATE
53.0 100 -
26.5 40 – 70 -
22.4 - 100
13.2 0 – 20 40 – 75
5.6 - 0 – 20
2.8 0–5 0-5
Spreading and Rolling Coarse Aggregates for the First Layer
Immediately after the application of primer or tack coat, the clean, dry and dust free
coarse aggregates shall be spread uniformly and evenly, by mechanical means, at the rate
164
CONTRACTOR NLUO
of 0.5 m3 per 10 m2 area. Immediately after spreading of the aggregates, the entire
surface shall be rolled with 8 – 10 tones smooth wheel steel roller.
Application of Binder – First Spray
The binder shall be heated to the temperature appropriate to the grade of bitumen
approved by the Engineer and sprayed on the aggregate at the rate of 15 kg/10 Sqm
(measured in terms of residual bitumen content) at a uniform rate of spray by mechanical
sprayers capable of spraying bitumen uniformly at the specified rates and temperatures.
Excessive deposits of binder caused by stopping or starting of the sprayers or through
leakage or for any other reason shall be removed and made good.
Application of Binder – Second Spray
The second aggregate layer shall then be sprayed with binder at the rate of 15 kg/10 sqm
Application of Key Aggregate
Immediately after the second application of binder, key aggregates shall be spread
uniformly and evenly, preferably by mechanical means, at the rate of 0.13 m 3 / 10 m2 so
as to cover the surface completely. The key aggregate shall be clean, dry and free from
dust and deleterious matter. If necessary, the surface shall be swept to ensure uniform
application of the key aggregates. The entire surface shall then be rolled with an 8 – 10
tonnes smooth wheel steel roller. While rolling is in progress, additional key aggregates,
where required, shall be spread by hand. Rolling shall continue until the entire course is
thoroughly compacted and the key aggregates are firmly in position.
Final Surfacing
The built-up-spray grout shall be provided with final surfacing within a maximum of
forty-eight hours. If there is to be any delay, the course shall be covered by a seal coat to
before it is open to traffic. Where the seal coat is required as a result of the selected
method of performing this operation, then it shall be considered incidental to the work
and shall not be paid for separately.
Measurement
Built-up-spray grout shall be measured as finished work in square metres.
12. BITUMINOUS MACADAM AS PER CLAUSE NO. 504
This works shall consist of construction in a single course having 50 mm to 100 mm
thickness or in multiple courses of compacted crushed aggregates premixed with a
bituminous binder on a previously prepared base to the requirements of these
specifications. Bituminous macadam is more open graded than the dense graded
bituminous materials.
Bitumen
The bitumen shall be paving bitumen of Penetration Grade complying with Indian
Standard Specifications for “Paving Bitumen” IS:73, and given below.
165
CONTRACTOR NLUO
Composition of Bituminous Macadam
MIX DESIGNATION GRADING -1 GRADING - 2
NOMINAL AGGREGATE 40 MM 19 MM
SIZE
LAYER THICKNESS 80 – 100 MM 50 – 75 MM
IS SIEVE (MM) CUMULATIVE % BY WEIGHT OF TOTAL
AGGREGATE PASSING
45 100 -
37.5 90 – 100 -
26.5 75 – 100 100
19 - 90 – 100
13.2 35 – 61 56 – 88
4.75 13 – 22 16 – 36
2.36 4 – 19 4 – 19
0.3 2 – 10 2 – 10
0.075 0–8 0–8
BITUMEN CONTENT, % BY 3.1 – 3.4 3.3 – 3.5
WEIGHT OF TOTAL
1
MIXTURE
BITUMEN GRADE 35 – 90 35 TO 90
Note 1: Appropriate bitumen contents for conditions in cooler areas of India may be
up to 0.5% higher subject to the approval of the Engineer.
Coarse Aggregates
The coarse aggregates shall consist of crushed rock, crushed gravel or other hard
material retained on the 2.36 mm sieve. They shall be clean, hard, durable, of cubical
shape, free from dust and soft or friable matter, organic or other deleterious matter.
Fine Aggregates
Fine aggregates shall consist of crushed or naturally occurring material, or a combination
of the two, passing 2.36mm sieve and retained on 75micron sieve. They shall be clean,
hard, durable, dry and free from dust and soft or friable matter, organic or other
deleterious matter.
166
CONTRACTOR NLUO
Physical requirements for Coarse aggregate for Bituminous Mecadam.
PROPERTY TEST SPECIFICATION
Cleanliness
GRAIN SIZE ANALYSIS1 MAX 5% PASSING 0.075 MM
SIEVE
Particle shape
FLAKINESS AND MAX 30%
ELONGATION INDEX
(COMBINED)2
Strength*
LOS ANGELES ABRASION MAX 40 %
VALUE3
Durability
SOUNDNESS4
Sodium Sulphate Max 12 %
Magnesium Sulphate Max 18 %
Water Absorption
WATER ABSORPTION5 MAX 2 %
Stripping
COATING AND STRIPPING MINIMUM RETAINED
OF BITUMEN COATING
95%
AGGREGATE MIXTURES6
Water Sensitivity7
RETAINED TENSILE MIN 80 %
STRENGTH
Notes : 1. IS : 2386 Part 1 4. IS : 2386 Part 5
2. IS : 2386 Part 1 5. IS : 2386 Part 3
(the elongation test to be done only on non-flaky aggregates in the
sample)
3. IS : 2386 Part 4* 6. IS : 6241
7. The water sensitivity test is only to be carried out if the minimum
retained coating in the stripping test is less than 95 %.
* Aggregate may satisfy requirements of either of these two tests.
Proportioning of Material
The aggregates shall be proportioned and blended to produce a uniform mixture
complying with the requirements. The binder content shall be within a tolerance of ± 0.3
per cent by weight of total mixture when individual specimens are taken for quality
control tests.
Construction Operations
Preparation of the Base
The base on which bituminous macadam is to be laid shall be prepared, shaped and
compacted to the required profile as appropriate and a tack coat shall be applied.
167
CONTRACTOR NLUO
Protection of the Layer
The bituminous macadam shall be covered with either the next pavement course or
wearing course, as the case may be, within a maximum of forty eight hours. If there is to
be any delay, the course shall be covered by a seal coat before opening to any traffic.
The seal coat in such cases shall be considered incidental to the work and shall not be
paid for separately.
Measurement for Payment
Bituminous macadam shall be measured as finished work in cubic metres, or by weight
in metric tons, where used as regulating course, or square metres at the specified
thickness as indicated in the contract or shown on the drawings, or as otherwise directed
by the Engineer.
13. SEMI-DENSE BITUMINOUS CONCRETE AS PER CLAUSE NO. 508
Scope
This clause specifies the construction of Semi Dense Bituminous Concrete, for use in
wearing / binder and profile corrective courses. This work shall consist of construction in
a single or multiple layers of semi dense bituminous concrete on a previously prepared
bituminous bound surface. A single layer shall be 25 mm in thickness.
Materials
The bitumen shall be paving bitumen of Penetration grade complying with Indian
Standard Specification for Paving Bitumen, IS : 73 and of the penetration indicated in
Table given below for semi dense bituminous concrete, or this bitumen as modified by
one of the methods specified, or as otherwise specified in the contract. Guidance on the
selection of an appropriate grade of bitumen is given in the manual for construction and
supervision of bituminous works.
168
CONTRACTOR NLUO
Composition of Semi Dense Bituminous Concrete Pavement Layers
MIX DESIGNATION GRADING -1 GRADING - 2
NOMINAL 40 MM 19 MM
AGGREGATE SIZE
LAYER THICKNESS 80 – 100 MM 50 – 75 MM
IS SIEVE1 (MM) CUMULATIVE % BY WEIGHT OF TOTAL
AGGREGATE PASSING
45 - -
37.5 - -
26.5 - -
19 100 -
13.2 90 – 100 100
9.5 70 – 90 90 – 100
4.75 35 – 51 35 – 91
2.36 24 – 39 24 – 39
1.18 15 – 30 15 – 30
0.6 - -
0.3 9 – 19 9 – 19
0.15 - -
0.075 3–8 3–8
BITUMEN CONTENT, % MIN 4.5 MIN 5.0
BY MASS OF TOTAL
MIXTURE2
BITUMEN GRADE 65* 65*
(OPEN)
Note 1. The combined aggregate grading shall not vary from the low limit on one
sieve to the high limit on the adjacent sieve.
2. Determined by the Marshall method.
* Only in exception circumstances, 80/100 penetration grade may be used,
as approved by the engineer.
Coarse Aggregate
The coarse aggregates shall be hard crushed stone metal and that the aggregates shall
satisfy the physical requirements of Table given below.
169
CONTRACTOR NLUO
Physical Requirements for Coarse Aggregate for Semi Dense Bituminous Concrete
pavement layers.
PROPERTY TEST SPECIFICATION
Cleanliness (dust)
GRAIN SIZE ANALYSIS1 MAX 5% PASSING 0.075
MM SIEVE
Particle shape
FLAKINESS AND MAX 30%
ELONGATION INDEX
(COMBINED)2
Strength*
LOS ANGELES ABRASION MAX 40 %
3 Max 27 %
VALUE AGGREGATE
IMPACT VALUE4
Polishing
POLISHED STONE VALUE5 MIN 55 %
Durability 6
SOUNDNESS
Sodium Sulphate Max 12 %
Magnesium Sulphate Max 18 %
Water Absorption
WATER ABSORPTION7 MAX 2 %
Stripping
COATING AND STRIPPING OF MINIMUM RETAINED
BITUMEN AGGREGATE COATING 95%
MIXTURES9
7
Water Sensitivity
RETAINED TENSILE MIN 80 %
STRENGTH8
Notes : 1. IS : 2386 Part 1 6. IS : 2386 Part 5
3. IS : 2386 Part 1 7. IS : 2386 Part 3
(the elongation test to be done only on non-flaky aggregates in the
sample)
3. IS : 2386 Part 4* 8. AASHTO T283**
4. IS : 2386 Part 4* 9. IS : 6241
5. BS : 812 Part 114 IS : 6241
* Aggregate may satisfy requirements of either of these two tests.
** The water sensitivity test is only to be carried out if the minimum
retained coating in the stripping test is less than 95 %.
170
CONTRACTOR NLUO
Mixture Design
Apart from the conformity with the grading and quality requirements for individual
ingredients that the mixture shall meet the requirements set out in Table given below
Requirements For Semi Dense Bituminous Pavement Layers
MINIMUM STABILITY (KN AT 8.2
0
60 C)
MINIMUM FLOW (MM) 2
MAXIMUM FLOW (MM) 4
COMPACTION LEVEL (NUMBER 75 BLOWS ON EACH OF THE TWO
OF BLOWS) FACES OF THE SPECIMEN
PER CENT AIR VOIDS 3–5
PER CENT VOIDS IN MINERAL SEE TABLE
AGGREGATE (VMA)
PER CENT VOIDS FILLED WITH 65 – 78
BITUMEN (VFB)
The requirements for minimum per cent voids in mineral aggregate (VMA) are set out in
Table.
Minimum percent voids in mineral aggregate (VMA)
Nominal Minimum VMA, percent related to Design air voids, percent2
Maximum particle
size 3.0 4.0 5.0
9.5 14.0 15.0 16.0
12.5 13.0 14.0 15.0
19.0 12.0 13.0 14.0
25.0 11.0 12.0 13.0
37.5 10.0 11.0 12.0
Binder Content
The binder content shall be optimized to achieve the requirements of the mixture set out
in Table and the traffic volume as specified in the contract. The Marshall method for
determining the optimum binder content shall be adopted as describes in the Asphalt
institute Manual MS-2, replacing the aggregates retained on the 26.5 mm sieve and
retained on the 22.4 mm sieve, where approved by the engineer.
171
CONTRACTOR NLUO
Construction Operation
The surface on which the semi dense bituminous material is to be laid shall be prepared
as appropriate, or as directed by the engineer. The surface shall be thoroughly swept
clean by mechanical broom and dust removed by compressed air. In locations where a
mechanical broom cannot access, other approved methods shall be used as directed by
the engineer.
Where specified in the contract, or otherwise required by the engineer, a tack coat shall
be applied.
The compaction process shall be carried out by the same plant, and using the same
method, as approved in the laying trials, which may be varied only with the express
approval of the Engineer in writing.
Measurement of Payment
The SDMC shall be measured in C.u.m.
16. CLOSE-GRADED PREMIX SURFACING/MIXED SEAL SURFACING AS PER
CLAUSE NO. 512
Scope
This work shall consist of the preparation, laying and compaction of a close-graded
premix surfacing material of 20mm thickness composed of graded aggregates premixed
with a bituminous binder on a previously prepared surface, in accordance with the
requirements of these Specifications, to serve as a wearing course.
Aggregate Gradation
The coarse and fine aggregates shall be so graded or combined as to conform to one or
the other grading shown in Table.
Aggregate Gradation
CUMULATIVE PER CENT BY WEIGHT OF TOTAL
IS Sieve
Designation (mm) AGGREGATE A PASSING
Type B
TYPE A
13.2 mm - 100
11.2 mm 100 88 – 100
5.6 mm 52 – 88 31 – 52
2.8 mm 14 – 38 5 – 25
0.090 mm 0–5 0–5
Measurements for Payment
Close-graded premix surfacing, Type A or B shall be measured as finished work, for the
area specified to be covered, in square meters at a specified thickness. The area will be
the net area covered, and all allowances for wastage and cutting of joints shall be
deemed to be included in the rate.
172
CONTRACTOR NLUO
17 SEAL COAT
This work shall consist of the application of a seal coat for sealing the voids in the
bituminous surface laid to the specified levels, grade and cross fall (camber).
Seal coat shall be of either of the two types specified below:
a) Liquid seal coat comprising of an application of a layer of bituminous binder
followed by a cover of stone chips.
b) Premixed seal coat comprising of a thin application of fine aggregate premixed
with bituminous binder.
Materials
Binder
The quantity of bitumen per 10 square meters, shall be 9.8kg for Type A, and 6.8kg for
Type B seal coat. Where bituminous emulsion is used as a binder the quantities for Type
A and Type B seal coats shall be 15 kg and 10.5kg respectively.
Aggregate for Type B Seal Coat
The aggregate shall be sand or grit and shall consist of clean, hard durable, un-coated,
dry particles, and shall be free from dust soft or flaky/ elongated material, organic matter
or other deleterious substances. The aggregate shall pass 2.36mm sieve and be retained
on 180 micron sieve. The quantity used for premixing shall be 0.06 cubic meters per 10
square meters area.
Preparation of Surface
The seal coat shall be applied immediately after laying the bituminous course which is
required to be sealed. Before application of seal coat materials, the surface shall be
cleaned free of any dust or other extraneous matter.
Construction of Type B Seal Coat
A mixer of appropriate capacity and type approved by the Engineer shall be used for
preparation of the mixed material. The plant shall have separate dryer arrangements for
heating aggregate.
The binder shall be heated in boilers of suitable design, approved by the Engineer to the
temperature appropriate to the grade of bitumen or as directed by the Engineer. The
aggregates shall be dry and suitably heated to a temperature between 1500C and 1650C
or as directed by the Engineer before these components are placed in the mixer. Mixing
of binder with aggregates to the specified proportions shall be continued until the latter
are thoroughly coated with the former.
The mix shall be immediately transported from the mixing plant to the point of use and
spread uniformly on the bituminous surface to be sealed.
As soon as a sufficient length has been covered with the premixed material, the surface
shall be rolled with an 8 – 10 tone smooth-wheeled roller. Rolling shall be continued
until the premixed material completely seals the voids in the bituminous course and a
smooth uniform surface is obtained.
Measurement for Payment
173
CONTRACTOR NLUO
Seal coat Type A or B shall be measured as finished work, over the area specified to be
covered, in square meters at the thickness specified in the contract.
SECTION – XIV
TECHNICAL SPECIFICATION FOR ELECTRICAL WIRING
1. GENERAL REQUIREMENTS :
The installation shall generally be carried out in conforming with the requirements of the
Indian Electricity Act, 1910 as amended up to date and the Indian Electricity Rules, 1965
framed there under, the relevant regulation of the Electric Supply Authority concerned,
and also with the specifications laid down in the Indian Standard I.S. 732-1963 Code of
practice (revised for Electrical Wiring Installations (system voltage not exceeding 650
volts) and I.S. 2309-1962 Code of Practice for the protection of buildings and Allied
Structure against Lighting and IS 3043 - Indian Code of practice for Earthling. The
wiring shall also be according to the specifications of P.W.D. of the Local Government.
2. MATERIALS :
All materials, fittings, appliances, used in electrical installations, shall conform to Indian
Standard Specifications wherever these exist. A list of approved materials is attached
afterwards. Materials not included in the list shall be got approved by the Architects /
Engineer-in-charge / Owner prior to actual use.
3. MAIN SWITCH GEAR :
Iron clad switch fuse and isolator units should conform to B.S. 861 (I.S. 2510-1954). The
quick made and break mechanism shall be self interlocked with the cover. In “Off”
position there must be two breaks per pole.
Main switch gear shall be properly earthed with two numbers conductors if M.V. and
one number of L.V.
4. BUSBAR CHAMBER (BBC) :
This shall be totally enclosed, metal clad type fabricated from rust proofed 14 SWG
sheet steel on angle iron frame and provided with sheet or cast iron cover and undrilled
detachable and plates, suitable for mounting angle iron floor stand and painted with high
quality enamel paint. G.I. bolts and nuts shall be used for assembly with suitable packing
materials to ensure dust proof finish. Meters shall be provided on suitable sheet steel
boxes. Switch shall be provided with cable and boxes as required.
The depth of B.B.C. shall be 150 mm (minimum). Minimum clearance of phase bars to
earth shall be 25 mm and between bus bars shall be minimum 32 mm.
H.C. (High Conductivity) copper busbars properly tinned are to be rated at 1000 amps.
per sq. in and aluminum bus bars (wrought aluminum alloy strip) conforming to relevant
I.S. specification at 800 amps per sq. in.
174
CONTRACTOR NLUO
Neutral Busbars are to be rated to carry 60% of phase current. These shall be carried on
glazed porcelain supports of proper diselectric and mechanical strength and shall be
appropriately colour coded for identification of phase.
Lettering shall be done for identification of switches as directed. The contractor shall
submit fully dimensioned drawing of the board with the physical position of the switches
and other components to the Architects for their approval before the same is fabricated.
There shall be two numbers of Earth Terminals Suitable Danger Board shall be provided.
5. INTERCONNECTION B.B.C. & SWITCH FUSE, METERS :
For ratings above 150 Amps these shall consist of insulated copper strips to adequate
section. For ratings below 150 Amps PVC copper cable tails of appropriate size,
terminating in tinned copper sockets may be used. The above are to be enclosed either in
sheet metal trunking or conduits so that no part is exposed.
6. DISTRIBUTION BOARDS :
These totally enclosed metal clad type Distribution Boards with hinged lids shall be in
accordance with I.S. 2147-1952 and 2675-1966 and B.S. 214 and shall be welded
construction and fabricated from rust proofed sheet steel and finished with anticorrosive
stove enamel paint and have provision for fixing on wall and having earthing terminals.
Main Power DB shall be free standing floor mounting type and branch DB shall be wall
mounting type.
Power Distribution Boards (400 volts TPN) shall be constructed from 14 SWG sheet
steel and Branch Distribution Board (230 volts SPN from 16 SWG sheet steel).
The minimum ratings of phase and neutral busbars shall be 67% of the total ratings of
fuse ways. Above 32 Amps Neutral Busbars may be half the size of the phase Bus Bars.
The fuses shall be mounted on glazed porcelain supports of proper dielectric and
mechanical strength. TPN suits should have phase separation barriers between fuse
N.L.U.Os.
Cables shall be connected to a terminal by crimped lugs.
Where two or more B.D.B.‟s feeding low voltage circuits are fed from different phases
of a medium voltage supply there B.D.B.‟s shall be installed atleast two metres apart.
All three phase power distribution boards shall be properly earthed with two number 10
S.W.G. galvanized iron wires and provided with suitable Danger Boards. All SPN
B.D.B.‟s shall be properly earthed with one number 10 SWG galvanized iron wire each.
Branch DB (LDB) :
 The incomer to the LDB shall be terminated in a suitable rated TB (not directly on
ELCB/MCB).
 The size of the DB shall have space for comfortable accommodate all MSBs, ELCB,
TB and have space for minimum 2 nos of spare MCBs.
 All MCB shall be min 9KA rating and „C‟ curve type.
7. SWITCHES :
All switches for lights, fans and plug points shall be Modular type switches, unless
specified otherwise.
175
CONTRACTOR NLUO
8. CABLES AND CONDUCTORS :
All cables shall conform to relevant Indian Standard. Conductors of all cables except for
flexible cables, shall be of aluminium, unless specified otherwise. All LT cable shall be
FRLS type PVC insulated and 1000 V grade.
9. FLEXIBLE CABLES :
Conductors of flexible cables shall be of PVC insulated FRLS copper the minimum size
of core acceptable is 1.5 sqm. (other than telephone cable). The maximum weight to
which the following twin flexible cords may be subjected are as follows :
Twin 16 / 0.20 mm : 3.3 Ibs (1.5 Kgs.)
Twin 23 / 0.0076 inch : 5.0 Ibs (2.3 Kgs.)
10. INSTALLATION OF MAIN SWITCH BOARDS, BDB‟S MAINS, SUBMAINS,
DISTRIBUTION WIRING TO INDIVIDUAL POINTS :
The exact positions of all main switch boards, BDB‟s and all funds of mains and sub-
mains, and distribution wirings to individual points including the exact position of all
light fittings and switch boards shall be first marked on the buildings and shall be
approved by the Engineer in charge before actual commencement of the work.
The D.B.‟s shall be generally be installed at a height of 2.13 m (7 ft) from floor level.
11. INSTALLATION OF SWITCH BOARDS :
These shall be installed at a height of 1.3 mtrs. (4‟ - 3”) and above the floor level.
12. INSTALLATION OF CEILING FANS :
Unless otherwise specified all ceiling fans shall be hung not less than 2.75 M (9 ft.) above
floor. The suspension and clamp shall be painted with approved paint without involving
extra cost.
13. INSTALLATION OF FLUORESCENT LIGHT FITTINGS :
Where these are suspended from ceiling by two down rods, or fixed to ceiling / beam
directly, atleast one fixing to the ceiling / beam shall be made with Mechanical / Metal
fasteners. Electrical drill only shall be used while making holes for the fasteners which
shall be capable of sustaining at least 11 kg. of dead weight.
The down rods and accessories shall be painted with approved paint without involving
extra cost.
Unless otherwise specified these should be suspended 2.60 m (8‟-6”) above the floor.
The Fluorescent light point/ Ceiling fan point and exhaust fan point shall be terminated
in a ceiling rose and at the time of equipment/ fitting installation it is to be connected
with the ceiling rose. The connection (supply and erection) is in the scope of contractor
installing the light/fan fittings.
176
CONTRACTOR NLUO
14. INSTALLATION OF EXHAUST FANS :
Exhaust fans shall be fitted by means of rag bolts embedded in the wall. The required
holes in the wall shall be made and finished neatly with cement plaster and brought to
the original finish of the wall. All exhaust fan shall be fitted with with GI Louvers at the
outer side.
15. INSTALLATION OF SOCKET OUTLETS :
No socket outlet shall be provided in the bath room at the height less than 130 cms. (4‟-
3”) from the floor.
No switches shall be provided inside the bath rooms, unless approved by the Engineer in
charge.
Socket outlet at locations other than bath rooms shall be either 25 cm (10”) or 130 cms
(4‟-3”) from the floor.
16. INSTALLATION OF ELECTRIC MOTORS :
Electric Motors shall be earthed with 2 numbers of earthing in opposite side. Earth flat is
to be brought near the equipment and then connected by wire rope socketed at the ends.
17. TESTING OF INSTALLATION :
Before a completed installation or an addition to an existing installation is put into
service, the following tests shall be carried out by the contractor in presence of the
Engineer-in-charge.
(a) Polarity of switches :
It must be ensured by test that all single pole switches have been fitted on the live side of
the circuits they control.
(b) Insulation test :
(i) By applying a 500 volt megger between earth and the whole system of conductors or any
section thereof, with all fuses in place and all switches closed, all lamps in position or
both poles of installation otherwise electrically connected together. The result in
meghom shall not be less than 50 devided by the number of points on the circuit, and
should not be less than 1 meghom.
(ii) Between all conductors connected to one phase and all conductors connected to the
neutral or to the other phase conductors of the supply after removing all metallic
connections between the two poles of the installation and switches on all switches. The
insulation resistance shall be as in (I) above.
(c) Earth Continuity Test :
The earth continuity conductor including metal conduits, and metal sheaths of cables in all
cases shall be tested for electrical continuity. Electrical resistance of the above along
with the earthing leas cut excluding any resistance of earth leakage circuit breaker,
measured from the connection with the earth electrode to any point in the earth
continuity conductor in the completed installation shall not exceed one ohm.
177
CONTRACTOR NLUO
(d) Earth Resistance Test :
To ensure effectiveness of installation earth, the value of earth resistance shall within 5
0hm for installation capacity upto 5 KW and one ohm for installation of higher capacity.
18. The completed work will be taken over only if the result obtained in above tests are within
the limits mentioned above and in accordance with I.E. Rules.
On completion of the installation work, a certificate shall be furnished by the contractor,
countersigned by the certified supervisor under whose direct supervision the installation
was carried out. This certificate shall be in a prescribed form as required by the local
Electric Supply Authority.
19. SPECIAL SPECIFICATIONS :
(a) Before fixing all switches, fittings etc. should be produced before Engineer in Charge
and get approved.
(b) All metal switch boards and switch / regulator boxes to be used in work shall be
painted with two coats of anti rust primer (red oxide paint) prior to erection. After
erection they shall be again painted with two coats of enamel paint of approved
quality.
(c) Before execution of any portion of conduit work for wiring neat proper layout should
be made out by the contractor and got approved from the Engineer-in-charge. For
this purpose contractor is advised to get acquainted with the layout drawings of the
Consultant / Architect.
(d) While laying the conduits for concealed wiring in the ceiling or in the beams and
columns and before casting the contractor must ensure that all the inlets and both
ends of the conduits are plugged by means of dead end socket so that no foreign
matter can enter the conduits and choke them.
(e) Damage to any fitting during erection and before handing over the installation by
contractor shall be set right or replaced by the contractor at his own cost.
(f) Caution Board or proper size wherever required, shall be provided, as per I.E.E.
regulations for which no extra payment will be admissible.
(g) Any repairs done to wall etc. should match with the surrounding surface otherwise
same will be got done through Building Contractor at the cost of the Electrical
Contractor.
(h) Earthing installation shall be done in the presence of Engineer-in-charge or his
representative.
(i) The installation should not be enertized without adequate earthing.
(j) The I.C. switches and Distribution Fuse Boards shall be provided with neat lettering
in block letters with paint for identification of the I.C. switches and for the points
178
CONTRACTOR NLUO
connected to each fuse way of the D.B.‟s for which no extra payment will be
admissible.
(k) Completion Drawings.
The contractor shall be required to submit along with Final bill, the under noted
drawings on tracing papers, along with three copies of Ammonia print each.
(l) Plan (as per structural drawing) of each floor (not less than 1 : 100 metric scale)
showing :
(i) Locations of Main Switch Board, Distribution boards (with the circuit numbers
controlled by them).
(ii) The runs of mains and sub-mains.
(iii) Location of lights, fans wall sockets, other power consuming devices together
with type of fittings and fixtures including circuit numbers.
(iv) Position of lighting conductors and route of running conductor.
(v) Position of Earthing Stations for light and power and Lighting conductor
installation.
and giving the following informations on the plans :
(a) Name of work with job no. Accepted Tender No.
(b) Date of completion.
(c) Name of the place.
(d) Name and signature of the Contractor.
(e) Scale of Drawings.
2. Schematic line layout diagram of each floor showing (i) layout and connections of Main
and Sub-board, B.D.B. having descriptions of the size, capacity, type and their numbers
the system and the source of supply, (ii) Location, size, type, length of main and sub
main cables (iii) Loading of each B.D.B indications of phases, Departmental mark in
each B.D.B. and switchgear.
The drawings shall be very neatly drawn and submitted properly without folding them.
3. Cable route should be marked on site plan with measurements from permanent
structures.
179
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR CONDUIT WIRING SYSTEM
1. Type and size of conduit :
All conduit pipe shall be screwed type, solid drawn or welded and with black stove
enameled surface or galvanised and of thickness conforming to IS : 9537 part II of 1981
(or latest revision) in all respects. The conduits are to be free from burrs and internal
roughness. No conduits less than 20 mm in dia shall be used, unless specified.
2. Accessories :
Only screwed type of accessories are to be used.
3. Conduit Joints :
The conduit shall be properly earthed. In long distance straight runs of conduit either
inspection type screwed couplers are to be provided at reasonable intervals on running
threads with couplers and jamnuts. Threads on conduit pipes in all cases shall be
between 13 mm to 27 mm long sufficient to accommodate pipes to full threaded portion
of couplers or accessories. Cut end of conduit pipes shall have no sharp edges or any
burrs left to avoid damage to insulation of conductor while pulling them through such
pipes.
4. Protection against dampness and rust :
In order to minimize condensation and sweating inside the tube, all outlets of pipes
system shall be properly drained and ventilated, but in such a manner as to prevent entry
to insects inside the conduit.
To protect against rust the outer surface of the conduit and accessories shall be painted
and the bare thread portion is to be portions with anti corrosive preservative.
5. Fixing of Conduits :
conduits pipes shall be fixed by heavy gauge saddles and h.w. or metal bars, secured to
wall / ceiling by screws driven into wood plugs or rawl plug or phil plugs at an interval
or not more than 76 cm apart for vertical run and 60 cm apart for horizontal run, but on
other side of couplers or bend or similar fitting saddles shall be fixed at distance of 30
cm from the center of such fittings. The minimum thickness for saddles shall be 24
SWG, for conduits upto 25 mm dia and 20 SWG for larger sizes.
6. Bends in conduits :
All necessary bends in the system including diversion shall be done bending the pipes, or
by inserting suitable inspection type bends, elbows or similar fittings, or by fixing cast
iron inspection boxes whichever is most suitable.
180
CONTRACTOR NLUO
7. Outlets :
All outlets for fittings, switches etc. shall be fixed on boxes of suitable metal for either
surface mounting system or flush mounting system. In case of cast iron boxes the wall
thickness shall be at least 3 mm and in case of welded mild steel sheet box of wall
thickness shall not be less than 16 gauge. Except where otherwise stated 3 mm thick
insulated laminated sheets shall be fixed on the front with screws. Where conduits are
terminated. Special care shall be taken in employing double jamnuts, special care shall
be taken in employed double jamnuts, for securely fixing conduits to outlets so as to
prevent any possibility of damages to cables when drawn.
8. Cables to be used :
Unless stated otherwise only single core PVC insulated cables of approved
manufacturers shall be used for wiring in conduit shall not be greater than maximum set
out in Table II of Indian Standard (I.S. 732-1963) code or practice (revised) for electrical
wiring installation (system voltage not exceeding 650 volts).
9. Looping in system :
Distribution wiring in conduit to light, fan plug points etc. shall be done in looping
system. In this system no joints or connections shall be made anywhere of the system
except at terminating points such as at terminals of switches, ceiling roses, etc. and in
case of socket outlets at the socket terminals.
10. Earthing continuity wires :
All three pin 5 Amps plug points and metallic fan regulator cover should be provided
with earthing attachment by No. 14 S.W.G. wires, unless specified otherwise.
Three pin 15 Amp power plug point should be provided with earthing attachment by No.
14 SWG G.I. wire, unless specified otherwise.
For conduits and accessories for distribution wiring should be provided with earthing
attachment by number 14 SWG G.I. wire, unless specified otherwise.
For looping earthing G.I. wire shall be run conduits being fixed with saddles, this wire
shall not be normally visible after installation when run with the conduit. Where the wire
has to be ;taken without ;the conduits this will be fixed with “U” nails at 2‟-0” intervals.
11. Painting :
Conduit and all conduit fittings and accessories shall be painted with two coats matt
paint. Painting of conduits shall be done to harmonize with colour bearing surface, i.e.
wall, joints, trusses etc. after installation and as approved by the Engineer-in-charge.
181
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR
CONCEALED CONDUIT WIRING SYSTEM
1. Concealed conduit wiring system shall comply with all requirements for surface conduit
wiring system as specified above and in addition conform to the requirements specified
below :
2. Making of Chase :
The chase in the wall shall be neatly made and be of ample dimensions to permit the
conduit to be fixed in the manner desired.
3. Fixing of Conduit in Chase :
The conduit pipes shall be fixed by means of staples, J-Hooks or by means of saddles
not more than 60 cm apart. Fixing of standard bends or elbows shall be avoided as far as
pipes with a long radius which will permit easy drawing in of conductor. All threaded
joints of metallic conduits shall be treated with some approved preservative to secure
protection against rust.
4. Inspection Boxes :
Suitable inspection boxes shall be provided when necessary to permit periodical
inspection and to facilitate removal of wires. These shall be mounted flush with wall.
5. Types of accessories to be used :
All outlets such as switches, socket outlets, shall be flush mounting type with cast iron or
M.S. boxes with a cover of approved insulating materials. The switches and other outlets
shall be mounted inside such boxes as would be approved. The metal box shall be
efficiently earthed with conduit by means of earthing attachment with No. 14 SWG G.I.
wire, running inside the conduit.
6. Conduits :
(i) Steel-Black enameled screw type M.S. conduits with thickness conforming to IS :
9537 part II or 1981 (or latest revision)
(ii) PVC / Polythene-Medium gauge pipes of reputed make having 3 mm wall thickness
shall be used.
For roof slabs - These shall be prelaid during casting of floor / roof slab. No. of wires
drawn through the same shall not exceed the number of specified I.S. code.
For vertical drops in wall to switch boards-Minimum size shall be 13 mm bore through
which not more 2 Nos. 1/1-40 and G.I. earth wire shall be drawn.
(iii) Maximum capacity of conduits for drawing in of PVC insulated cables shall be as
follows :
650 / 1100 V PVC In 20 mm dia. In 25 mm dia.
Copper wire. Conduits. Conduits.
182
CONTRACTOR NLUO
1.5 Sqm. 4 Nos. 10 Nos.
2.5 Sqm. 4 Nos. 10 Nos.
4.0 Sqm. 3 Nos. 8 Nos.
6.0 Sqm. 2 Nos. 6 Nos.
10 Sqm. - 4 Nos.
16 Sqm. - 2 Nos.
7. Fish wire - 18 SWG G.I. wire shall be used and it shall protrude the conduit ends by 9
inches.
8. Conduit laying in floor / roof slabs before casting :
PVC / Ploythene / G.I. conduit shall be laid straight as far as practicable and properly
placed including binding with the steel reinforcement rods with 22 SWG G.I. wire so
that proper positions of conduits are maintained.
While laying the conduits for concealed wiring in the ceiling or in the beams and
columns and before casting, the contractor shall ensure that both ends of the conduit are
plugged by means of dead-end socket or otherwise so that any foreign matter cannot
enter the conduit and choke them.
All precaution must be taken while laying the conduits on the slabs, R.C. walls, columns
etc. and the contractor shall rectify at his own cost if any defects are found during
process of drawing cables through the concealed prelaid conduits.
Each PVC / Polythene conduit shall be provided with protruding length of not less than 9
inches on free end of the conduits.
There shall be no intermediate joints in one straight run of conduit.
All ceiling outlets shall be terminated in a round C.I. / G.I. circular box / deep box to suit
standard size ceiling rose or / and rectangular C.I. / M.S. junction box or fan hook box
as the case may be.
It will be mandatory for the contractor to get the layouts approved by the Engineer-in-
charge / Architect when the conduits are laid and bound to steel reinforcement rods,
before he can release the work for casting of floor / roof.
9. Connector Boxes, Draw-in-Boxes, junction Boxes :
These shall be constructed from 16 SWG M.S. sheet and have M.S. cover. Minimum
size for connector boxes in 6” x 4” and for Draw in Boxes 4” x 4”.
10. Fan Hook Boxes :
These shall be 100 mm (4”) dia x 75 mm (3”) deep, constructed from 16 SWG M.S.
sheet, and provided with one 12 mm dia M.S. rod 300 mm (12” long).
11. Painting :
outside of wall switch boards, connector boxes and draw-in-boxes and other C.I. / M.S.
accessories shall be painted with two coats of anti-rust paint in addition to other painting
instruction given elsewhere.
183
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR CABLE INSTALLATIONS
1. General :
All HV cables (upto 33 KV earthed system) shall be XLPE insulated aluminium
conductor cable conforming to I.S. 692 and I.S. 7098 respectively.
All medium voltage and Low Voltage PVC insulated FRLS type and armoured /
unarmoured cables shall conform to I.S. 1554 Part-I-1964 and of 1100 volt grade.
Old and used cables must not be used for installation. Only one make of cable shall be
used. All cables brought to site must be tested and got approved by the Engineer-in-
charge before these can be laid. The cables shall be dispatched to site on wooden drums
with ends sealed. Exact lengths shall be determined by the Contractor after measurement
at site.
The underground installation of cables shall be generally conforming to I.S. 1255-1967,
Code of practice for installation and maintenance of underground cables (upto including
33 KV).
2. Laying of cables :
(a) Direct in Ground :
Trenches shall be 750 mm deep (minimum) for LT cables and 1.2 M (4‟-0”) deep
minimum for HT Cables from ground level and trenching work shall including all
pumping and bailing out water. These trenches shall be wide enough to accommodate all
the cables with brick separations as per the requirements specified in the relevant I.S.
When more than one multicore cable is to be laid in the same trench, a minimum
horizontal interaxial spacing between cables will be as per relevant I.S.
After excavation of the trench of proper size, the bottom of the trench shall be dressed
and leveled and filled with 75 mm layer of fine sand. The cable shall then be laid with
bricks on both sides of the cable continuously. After having the space within the bricks,
filled and packed upto a level of 75 mm (3”) above top of cable with fine sand, the top
layer of bricks shall be placed side by side in continuous series as protective cover. Total
No. of bricks required being 16 per metre run. The remainder of the trench shall be filled
with riddles soil, well rammed and watered to a level of 75 mm (3‟-0”) above
surrounding ground level. The ground
level surface of the whole trench route shall be restored properly after completion of
cable laying.
(b) Inside Building :
Cables shall be laid on walls / ceilings / structure, unless specified otherwise with M.S.
brackets and suitable clamps or over claw type aluminium cleats fixed on M.S. brackets,
spaced not more than 450 mm apart. G.I. Bolts of suitable sizes are to be grouted on the
wall properly for fixing the brackets.
(c) Minimum bending radius permissible in 120 for MV cables and 20d for HV cables. At
joints and terminations the individuals core of multicore cables should never be bent so
that the radius is less than 15 times the diameters over the insulation.
184
CONTRACTOR NLUO
No cable jointing is allowed between two terminals points.
3. Cable Jointing :
All cable joints shall be carried out by experiences and Licensed jointers under strict
supervision. Electro plated brass cable glands, aluminium / tinned copper cable sockets
and approved jointing materials must be used. The price for cable jointing and finishing
the ends of the cable shall include all materials and shall also provide for tools and plants
for the work. The cable accessories and other associated materials shall conform to
Indian Standard Specification where applicable. Proper earthing of cable glands and
armoured shall be included in the job.
4. Testing of Cables :
All cables shall be tested for insulation resistance with megger - 5000 V constant
pressure meter insulation tester for HT cables and 1000 V constant pressure megger for
LV cables, before installation.
After installation and end termination, cables shall be again subjected to the above test.
Insulation value for HT Cables shall not be less than 100 mega ohms and for MV Cables
1.0 mega ohm.
After laying and jointing, the HV cables shall be subjected to high voltage pressure test
before commissioning the test voltage being as specified in I.S. 1225-1967 or latest.
5. Testing of Installation :
Before the completed installation is put into service or handed over to owner, the
installation is to be subjected to the above tests to the satisfaction of the Engineer-in-
charge. The completed work will be taken over only if the results are acceptable to the
Architects / Owner.
185
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR EARTHING INSTALLATION
The installation shall generally conform to I.S. 3043-Indian Standard Code of practice for
Earthing, as amended upto date.
1. Earthing Electrode :
The earthing electrode shall be galvanized steel pipe of class B medium quality 50 mm
(2”) dia bore and 3.04 M (10”) long. A hole shall be provided at 100 mm (4”) from the
top end to receive a 13 mm (1/2”) dia galvanised bolt and the bottom end shall be chisel
cut for easy penetration into soil.
A suitable trench shall be excavated about 0.45 M (1”-6”) deep and the pipe electrode
driven to an average depth of 3.35 M (1”-0”) below ground level. The top end of the
electrode shall be at an average depth of 3.30 M (1”) below the ground surface.
Alternate layers of Charcoal or Salt and coke to be provided for Electrode as per I.S.
code of Practice unless specified otherwise.
One No. SWG G.I. wire (unless otherwise specified) shall be connected securely on the
properly cleaned surface at the top end of pipe electrode by means of a 100 mm (4”) long
x 13 mm (1/2”) dia G.I. bolt nut and double washers. The earth lead conductor shall be
protected mechanically be means of a continuous length of G.I. pipe (Class A) having 13
mm (1/2”) inside diameter upto a height of 0.60 M (2‟) above ground and the same shall
be completely filled with bitumen compound and topped upto overflowing.
2. Masonry Inspection Pit :
The inspection pit for the earth station shall be approx 0.56 M x 0.56 M (1‟-10” x 1‟-
10”) outside dimensions and approx. 0.45 M (1‟-6”) deep when completed, having 5”
thick cement brick work with 1st class bricks in cement mortar (6 : 1) both inside and
outside plastering 19 mm (3 / 4”) thick and neatly cemented 1.60 mm (1 / 16”) thick,
both inside, outside and top. The opening on top shall be provided with a C.I. ring with
lockable cover fixed flush with ground surface.
All the excavations shall be duly back filled, dressed and rammed.
3. Locations for Earth Electrodes :
Electrodes shall be buried at least 2 M (6‟-6”) away from the building pole or object to
be earthed. However, earthing electrodes for L.C. installations should be as clode to the
down conductors as possible.
Electrodes when installed in parallel, shall not be placed less than 2 M (6”-6”) apart and
preferably placed at distances greater then twice their lengths.
4. Earth Busbar :
(a) Galvanised M.S. Flat :
The Busbar shall be of suitable size and length, as specified in the Schedule of items,
heavily galvanized and having adequate number of drilled and tapped holes 30 mm
apart, completed with G.I. bolts, nuts, washers for securely connecting the earth leads
and earth continuity conductors. The busbar shall be fixed on wall, having clearance of 6
mm from wall with spacing insulators with at least the numbers 13 mm (1/2‟) G.I. rag
bolts spaced about 0.46 M (1‟6”) apart.
186
CONTRACTOR NLUO
(b) Copper Flats :
To be used, as specified, in the Schedule of Items, where earthing requirement are more
stringent. Brass bolts, nuts washers shall be used for connections.
5. Value of Earth Resistance :
In case of installations where the load does not exceed 5 K.W. the resistance to earth
shall on no account exceed 5 Ohm for other cases the resistance shall not exceed 1 ohm.
For sub-station, the value is 1 ohm.
For L.C. installations the value is 1 ohm.
187
CONTRACTOR NLUO
TECHNICAL SPECIFATION FOR L.C. INSTALLATION
Specifications :
The installation shall conform to I.S. : 2309-1969 as amended upto date.
1. Conductor for L.C. System :
It shall be well galvanized No. 7 / 8 SWG G.I. stranded wire galvanizing conforming to
B.S. 728 / 1961) unless specified otherwise. The conductor shall be well annealed and
flexible. There shall be no joints in any conductor between terminal ends.
2. Air Terminals :
Air Terminal shall be single prong type constructed of 15 mm N.B. (Class-B) medium
quality G.I. pipe 30 cm long with a screwed G.I. solid conical cap 100 mm long (overall)
on top and shall have a screwed galvanized M.S. flange 75 mm dia x 6 mm thick at
bottom end and shall be grouted on the parapet roof, etc. with rag bolts in cement mortar
unless specified otherwise.
3. Conductor on Parapet :
The conductor shall be coursed along ridges, parapets, edges of the flat roof, over flat
roof where necessary in such a way as to joint each air terminals to the rest. The
conductors shall be fixed securely with proper saddles spaced not more than 2 ft. (0.6 M)
apart.
4. Vertical Down Conductors :
The Conductors, direct from test point shall be connected to parapet conductors or air
terminals and shall be coursed through shortest possible routes without abrupt turns or
kinks. While passing through cornices, these shall pass through G.I. pipe (Class-B)
having adequate bore. There conductor shall be fixed securely with proper saddles
spaced not more than 2‟ ft. (0.6 M) apart.
5. Protection Against Damage and Corrosion :
No upturns are permitted and any bend necessary shall have a permissible radius. The
end of G.I. pipe protections on wall shall be properly sealed with bitumen compound to
prevent corrosion.
6. Metallic objects near conductors :
The conductors shall be so laid as to maintain a separation distance exceeding 2 metre
(6‟-6”) between (a) any electric conductor running in parallel, (b) metallic objects, viz.
iron girders, water tanks, iron stair case, water / gas pipes inside or by the side of the
building.
All the external metallic objects viz. water tanks, gutters, rain water down pipes, water
mains, etc. shall be bonded to the nearest conductor by means of a short tail.
188
CONTRACTOR NLUO
7. Joints and Bonds :
All joints between conductors shall be made after cleaning and timing the ends of
conductors to be joined, binding them together for about 100 mm (4‟-0”) with No. 14
SWG G.I. wire and then welding. Joint between Air Terminals and conductors shall be
made with proper lugs duly fixed to conductors and bolts, nuts washers etc.
Bonding shall be as short as possible. All joints and Bends are to be mechanically and
electrically sound.
8. Earth Station :
Similar to installation earths as specified elsewhere. Minimum number of earth station is
two.
9. Installation Tests :
After completion of works the ohmic resistance of L.C. installation complete with air
terminals (without earth connection) shall be measured from the highest point and this
shall be a fraction of one ohm.
The resistance to each of individual earth stations shall be tested by earth testing megger
and must not exceed 1.0 ohms.
The above tests shall be made in the presence of the representative of the Engineer-in-
charge / Architects and the results recorded.
10. Completion Drawings :
This shall be submitted along with the final bill.
189
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR TELEPHONE WIRING
1. The telephone cabling installation work is to be carried out following the systems and
the norms followed / desired by the statutory bodies and the standard codes and practices
as applicable for the particular installation.
The entire wiring of telephone installations is to be carried out in such a manner that
there should not be any harm or interference to the system due to laying of electrical
conduits laid side-by-side or cross wise. Approved quality and make of the cables shall
be taken so that accidental higher voltage dose not occurs to the terminals
appliances/equipment.
Telephone wiring for the building is to be carried out mostly in concealed manner. The
trunking shall be laid as per sketch at with cut-out at top regular intervals, not
exceeding 3 meter at locations indicated in the drawing. Tee junction and right angle
bends, etc. shall be provided as per sketch where necessary. 6mm thick chequered
aluminum sheet cover shall be provided at all the cut-outs, tee-junction and right angle
bends which will have to match with the ultimate floor finish. The trunking shall be
provided with 18 SWG G.I. fish wire to enable the contractor draw the wiring cables for
telephone connections shall be terminated to ceiling roses / telephone socket outlets /
M.S. junction boxes as required for telephone wire terminals and these shall be fixed on
nearest wall / columns after taking out from the trunking / junction box cover plate as
desired.
2. Pairs of 0.51 mm dia PVC insulated and sheathed twin twisted flexible tinned copper
conductor cable is to be drawn and laid in prelaid aluminium box trunking with cover in
floor from CT box to each telephone terminal / ceiling roses etc.
No wooden material shall be used. The wiring of Telephone cable shall be done in concealed
PVC conduit, separate from electrical conduit.
190
CONTRACTOR NLUO
SECTION -XV
STANDARD SPECIFICATION
All work under this contract shall be carried out in accordance either the technical
specification given in the documents if any part of the specification is not given in
this document and the latest issue of the Indian Standard Specification applicable
to the particular class of work. If Indian standard specification are not formulated for
any particular materials of work, the relevant British Standard Specification shall
apply. Relevant issue I.S. Specification shall be applicable to the particular work have
been described along with the specification for the respective works. In case of any
confusion or dispute regarding the meaning and interpretation of any specification
for the respective works. the decision of the NLUO/ Architect shall be final and
binding on the contractor.
191
CONTRACTOR NLUO
EXTERNAL ELECTRICAL WORKS
TECHNICAL SPECIFICATION FOR STREET LIGHT POLES
G.I. Tubular octagonal street light poles of 9 mtr. Long shall be of 200 mm dia 4.85 mm thick,
not bolted with base plate of size 300 mm x 300 mm x 6 mm thick at the bottom of the pole. The
pole gradually tapered from 200 mm to 40 mm dia approx. or as pre required size and 1500 mm
long, G.I. pipe shall be 120° with the horizontal axis for fixing of light fitting.
As far as possible, poles shall be fixed 1500 mm away from the road edge. The poles foundation
shall be buried from 1 / 5th to 1 / 6th of its length depending upon soil conditions.
Concrete platform shall be provided for base plate of pole. Before erecting the pole, the platform
shall be compacted from side with soil.
All fittings shall be permanently and effectively earthed. For this purpose, a continuous earth
wire shall be provided or armour of the cable shall be used for the same and securely fastened to
each pole through its junction box which is electrically continuous and securely fastened to each
pole and connected with earth minimum at three points in every K.M.
The earth wire duly protected in G.I. pipe shall run 450 mm below ground level from earth
electrode (which shall be 1.5 mt. away from pole) and then run either through G.I. pipe or
sufficiently strong muff covering along with pole vertically upto junction box. In junction box,
the earth shall be so fixed with thimbles through screws that screw is screwed to both junction
box and the pole. In case of unarmoured cable, he earth wire shall be of minimum 4 mm dia G.I.
wire and fixed of junction box as above.
192
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR COMPOUND LIGHTING
1. Tabular M S Pole :
The pole shall be as specified in the Schedule of Items. It shall be complete with sole
plate and cap, if required and shall have drilled holes of proper size at requisite places for
earthing.
The pole shall be treated internally, as well as externally upto a height of 12ft from butt
end with special bituminous preservative solutions, the remainder of the outside being
painted with one coat of Red Oxide primer if required.
2. Erection of M S pole :
The hole made in the ground for single pole is to be approximately 1.85 mtr. deep. A
precast base block (450 x 450 x 150 mm thick) is to be properly placed at the bottom of
the duly rammed hole and the pole, painted with a fresh coat of black anticorrosive paint
at the butt end upto a height of 12ft and complete with slow plate and cap is to be
erected, plumbed and lined up properly. The cable looping box of dimension as specified
elsewhere, and polythene pipe / pipes also of specified dimension for cables entry into
the cable looping box from underground are to be fixed in specified position at this
stage.
The C.C. foundation (1:3:6) of dimension 450 x 450 x 1500 deep shall then be cast using
timber shuttering. The concrete mixture, after pouring into position shall be well spread
and compacted by ramming. The shuttering shall not be removed within 48 hours after
casting. Concrete work shall be properly cured after removal of shuttering and the
excavated area around the foundation shall be back filled with earth duly rammed using
water and consolidated in layer not exceeding 150 mm at a time upto the required level
of ground surface.
Cement concrete muffing (1:3:6) of specified dimension shall be cast at the base of the
pole upto the specified height above ground level and it shall accommodate the cable
looping box. The muffing shall be finished with neat cement plastering of 3 mm
thickness after the concrete work has properly set.
The pole shall be plumbed before and after the concrete work.
3. Painting :
The pole shall be painted, after installation with one coat of primer and two coats of
ready mixed anti-corrosive aluminium paint after preparation of surface by sand
papering, cleaning, etc. for receiving fresh coat of paint, including numbering poles.
4. Materials for C.C. work foundation etc.
(a) Jhama chips shall be obtained by breaking good quality jhama bats and shall not be
spongy or with any coating of foreign materials. These shall be of sizes ¾” for base
block and 1 ¼” ½” (3/4cm) for foundation works. These shall be screened for removal
of dust.
193
CONTRACTOR NLUO
(b) Sand shall be coarse, sharp and free from clay, loan any other foreign materials and shall
be obtained from approved source.
(c) Cement No. cement expect from approved source shall be used. Cement damaged by
water or otherwise shall not be used.
(d) Paint-shall be of approved brand and quality and should be brought to site in original
sealed container-under no circumstances shall the paint be diluted with linseed oil or
otherwise.
194
CONTRACTOR NLUO
FEEDER PILLAR
1. The fabrication will be done out of 2 mm thick CRCA sheet with double door and inbuilt
locking arrangement.
2. All connections (Incoming and outgoing) will be taken out in cable alley with suitable
rated solid copper conductor.
3. The feeder pillar will have to be supplied with suitable pedestal (MS angle iron frame of
MS channel base for grouting in the RCC and proper gland at the bottom).
4. The depth of the feeder pillar has been considered as 400 mm.
5. The Bus Bars made of hard drawn Tinned copper are fitted on insulated DMC supports.
6. Sizes and arrangement are suggestive. Exact size and arrangement will be decided as per
requirement.
7. The feeder pillar should be provided will terminal blocks for incoming & outgoing
cables. From MCCB to terminal block wiring will be done with copper conductor /
suitable cable. Incoming / outgoing U.G. cable will be terminated in terminal block. This
will very much reduce congestion of cables.
8. All dimensions in mm.
195
CONTRACTOR NLUO
CABLE WORKS
1.00 SCOPE :
The intent of this specification is to define the requirements for the supply, installation,
testing and commissioning of the cabling system.
2.00 STANDARDS :
2.01 The work shall be carried out in the best workmanship manner in conformity with this
specification, the relevant specification / codes of practice of the Indian Standards
Institution, approved drawings and the instruction issued by the Engineer-in-charge or
his authorized representative, from time to time.
2.02 In addition to the standards mentioned in 2.01, all works shall also conform to the
requirement of the following :
(a) Indian Electricity Act and Rules framed thereunder.
(b) F ire Insurance Regulations.
(c) Regulations laid down by the Chief Electrical Inspector of the State / State
Electricity Board.
(d) Regulations laid down by the Factory Inspector of the State.
(e) Any other regulations laid down by the local authorities.
3.00 EQUIPMENT SPECIFICATIONS :
All materials, fittings and appliances to be supplied by the sub-contractor shall be of the
best quality and shall conform to the specification given hereunder. The equipment shall
be manufactured in accordance with current Indian Standard specifications wherever
they exist or with the B.S. or NEMA specifications, if no such ISS are available. In the
absence of any specification the materials shall be approved by the Owner or his
authorized representative.
All similar materials and removable parts shall be uniform and interchangeable with one
another.
3.01 POWER CABLES :
Power cables for use on 415 volt system shall be of 1100 volt grade, aluminium
conductor, PVC insulated, PVC sheathed single wire armoured and overall PVC
sheathed. Power cables for 11 KV system shall be aluminium conductor, PVC insulated,
PVC sheathed, single wire armoured and overall PVC sheathed.
Power cables for 33 KV system shall be aluminium conductor, PILC, steel tape
armoured and overall PVC sheathed.
All cables conform to the relevant sections of IS : 1554 Part I and II.
196
CONTRACTOR NLUO
Unarmoured cables will be used wherever specified on the cable schedule.
Sizes of 1100 Volt grade cables used for motor feeders shall be as per Table 1.
3.02 CONTROL CABLES :
Control cables shall be 1100 volt grade, 2.5 mm² copper conductor, PVC insulated, PVC
sheathed, single wire armoured with an overall PVC sheath, as per IS : 1554.
Unarmoured cables shall be used wherever specified on the cable schedule.
3.03 CABLE TRAYS :
Cable trays shall be fabricated as per detailed drawings. After fabrication, all metal
surfaces shall be cleaned free of mill scale and rust, degreased, given one coat of
redoxide primer and finished with one coat of bituminous aluminium paint. After
complete erection, the cable trays and supports shall be finally finished with a second
coat of bituminous aluminium paint.
3.04 CONNECTORS :
Cable terminations shall be made with orimped type solderless lugs of M/s. Dowells
make or approved equivalent.
3.05 CABLE IDENTIFICATION :
Cable numbers shall be of self sticking type and of approved make for individual cores,
and 2 mm thick lead strap for overall cable.
3.06 CABLE GLANDS :
Cable glands shall be double compression type of alunmunium, type „H.W.‟ of M/s.
Power Engg. Co. (Bombay) make or approved equivalent.
4.00 CABLE LAYING :
4.01 Cable network shall include power, control and lighting cables, which shall be laid in
trenches, cable trays or conduits as detailed in the relevant drawings and cable schedules.
Fabrication and erection supports of cable trays / as required shall be the responsibility
of the sub-contractor. Cable routing given on the layout drawings shall be checked in the
field to avoid interference with structures, piping or air-conditioning duct and minor
adjustments shall be done to suit the field conditions wherever deemed necessary
without any extra cost.
4.02 High voltage, medium voltage and other control cables shall be separated from each
other by adequate spacing or running through independent pipes.
4.03 All cable routes shall be carefully measured and cables cut to the required lengths,
leaving sufficient length for the final connection of the cable to the terminals of the
equipment. The various cable lengths cut from the cable reels shall be carefully selected
to prevent undue wastage of cables. The quantity indicated in the cable schedule is only
approximate. The contractor shall ascertain the exact requirement of cable for a
197
CONTRACTOR NLUO
particular feeder by measuring at sita and avoiding interference with structure,
foundation, pipe line or any other works.
4.04 Cables as far as possible shall be laid in complete, unout lengths from one termination to
the other.
Straight through joints if required shall be made by using epoxy resin type troplin
jointing kit.
4.05 Cables shall be neatly arranged in the trenches / trays in such a manner so that ODISHA-
crossing is avoided and final take off to the motor switchgear is facilitated. Arrangement
of cables within the trenches / trays shall be the responsibility of the sub-contractor.
4.06 All cables will be identified close to their termination point by cable numbers as per
cable schedule. Cable numbers will be punched on lead straps (2 mm thick) securely
fastened to the cable and wrapped round it.
Each underground cable shall be provided with identity tags of lead securely fastened
every 3 OM of its underground length with atleast one tag at each end before the cable
enters the ground.
In the unpaved areas, cable trenches shall be identified by means of markers as per
standard drawing. These posts shall be placed at location changes in the direction of
cables and at intervals of not more than 50 M, and at cable point locations.
4.07 All temporary ends of cables must be protected against dirt and moisture to prevent
damage to the insulation. For this purpose, ends of all PVC insulated cables shall be
taped with an approved PVC or rubber insulating tape. Use of fabrication type or other
fabric type tape is no permitted. Lead sheathed cables shall be plumbed with lead alloy.
4.08 R.C.C. cable trenches with removable cover as shown on the drawings will be provided
by the Owner. Medium voltage cables shall be laid in 3 or 4 tiers in these trenches as
indicated on the sectional drawings. Concrete cable trenches shall be filled with sand
where specified to avoid accumulation of hazardous gas……… RCC covers of trenches
in process areas shall be effectively sealed to avoid ingress of chemicals etc.
Cables shall be handled carefully during installation to prevent mechanical injury to the
cables. Ends of cables leaving trenches shall be coiled and provided with a protective
pipe or cover.
4.09 Directly buried cables shall be laid underground in excavated cable trenches where
specified on layout drawings. Trenches shall be of sufficient depth and width for
accommodation of all cables correctly spaced and arranged with a view of he dissipation
and economy of design.
Depth of burying shall allow minimum 500 mm soil cover for low voltage and 900 mm
for 11,000 Volt cables.
Cables shall be laid in trenches at depth as shown in the drawing. Before cables are
placed the trench bottom shall be filled with a layer of sand. This sand shall be leveled
and the cables laid over it. The cables shall be covered with 150 mm of sand on top of
the largest diameter cable, and sand shall be lightly pressed. A protective covering of 75
198
CONTRACTOR NLUO
mm thick second class red bricks shall then be laid flat. The reminder of the trench shall
then be back filled with soil, rammed and leveled.
As each row of cables is laid in place and before covering with sand every cable shall be
given an insulation test in the presence of Engineer-in-charge / Owner. Any cable which
proves defective shall be replaced before the next group of cables are laid.
All wall openings shall be effectively sealed after installation of cables to avoid leakage
of water.
4.10 Where cables rise from trenches to motor, push button lighting panels etc., they shall be
taken in G.I. pipes for mechanical protection upto a minimum of 300 mm above grade or
as shown in the diagram.
Cable ends shall be carefully pulled through the conduits, to prevent damage to the
cable. Where required, approved cable lubricant shall be used for this purpose. Where
cable enters conduit the cable should be bent in large radius. Radius shall not be less than
the recommended bending radius of the cables specified by the manufacturer.
Following guide of the pipe fill shall be used for sizing the pipe size :
(a) 1 cable in pipe - 53% full
(b) 2 cables in pipe - 31% full
(c) 3 or more cables - 43% full
(d) Multiple cables - 40% full
After the cables are installed and all testing is complete, conduit ends above grade shall
be plugged with a suitable weatherproof plastic compound / “PUTTI”, for sealing
purposes.
4.11 Where cables pass through foundation walls or other underground structures, the
necessary ducts or openings will be provided in advance for the same. However, should
it become necessary to out holes in existing foundations or structures the electrical
contractor shall determine their location and obtain approval of the Engineer-in-charge
before cutting is done.
4.12 At road crossing and other places where cables enter pipe sleeves adequate bed of sand
shall be given so that the cables do not slack and get damaged by pipe ends after back
filling.
High voltage cables shall be taken through individual pipe sleeves.
4.13 Where joints or tape are required to be made in the wiring, suitable junction boxes or tap
boxes shall be provided each equipped with the necessary cable glands. The individual
conductors shall be joined by means of solder-less connections supplied integrally and
mounted in the box on suitable insulating supports or supplied separately and insulated.
4.14 Drum number of each cable from which it is taken shall be recorded along with the cable
number in the cable schedule.
199
CONTRACTOR NLUO
4.15 Cables installed above grade shall be run in trays, exposed on walls, ceilings or
structures and shall be run parallel or at right angles to beams, walls or columns.
Cables shall be so routed that they will not be subjected to head from adjacent hot piping
or vessels.
4.16 Individual cables or small groups which run along structures may be directly attached
to the structures by saddles or clamps.
They shall be rigidly supported on structural steel and masonry, individually or in
groups as required, using individual cast or malleable iron galvanized clips. If drilling of
steel must be resorted to, approval must be secured and steel must be drilled where the
minimum weakening of the structure will result.
Cables shall be supported so as to prevent unsightly sagging. In general distance between
supports shall be approximately 500 mm to 500 mm for cables upto 25 mm diameter
and maximum 1000 mm for cables larger than 25 mm dia.
4.17 Cable trays and supporting steel shall be painted before laying of cables. The painting
shall be done with one coat of red lead paint and two coats of bituminous aluminium
paint.
5.00 TERMINATION :
5.01 All PVC cables upto 1.1 KV grade shall be terminated at the equipments by means of
double compression type cable glands of aluminium. Cable glands to be supplied by the
sub-contractor should be preferably M/s. Power Engg. Co. (Bombay) make or approved
equivalent. They shall have a screwed nipple with conduit electrical thread and check
nut.
5.02 Power cables shall be identified with red, yellow and blue PVC tapes. Where copper to
aluminium connections are made, necessary bimetallic washers shall be used. For trip
circuit identification additional red ferrules shall be used only in the particular cores of
control cables at the termination points in the switchgear / control panels and control
switches.
5.03 In case of control cables all cores shall be identified at both ends by their wire numbers
by means of PVC ferrules, or self sticking cable markers. Wire numbers shall be as per
schematic / connection drawing. Bidders shall have the samles of PVC ferrules / cable
markers approved before starting the work.
5.04 Where threaded cable gland is screwed into threaded opening of different size, suitable
galvanized threaded reducing bushing shall be used of approved type.
Sub-contractor shall drill holes for fixing glands wherever necessary. Gland plate shall
be of nonmagnetic materials / aluminium sheet in case of single core cables.
5.05 The cables shall be taken through glands inside the panels or any other electrical
equipment such as motors. The individual cores shall then be dressed and taken along the
cable ways (if provided) or shall be fixed to the panels with polytheylene straps. Only
control cables of single strand and lighting cables may be directly terminated on to the
terminals.
200
CONTRACTOR NLUO
In case of termination of cables at the bottom of a panel over a cable trench having no
access from the bottom a close fit hole should be drilled in the bottom plate for all the
cable in one line, then bottom plate should be split in two parts along the centre line of
holes. After installation of bottom plate and cables it should be sealed with cold setting
compound. Cables shall be clamped over the open armouring and connected to earth bus.
5.06 Cables leads shall be terminated at the equipment terminals, by means of crimped type
solderless connectors as manufactured by M/s. Dowell Electro work or approved
equivalent.
Crimping shall be done by hand crimping / hydraulically operated tool and conducting
jelly shall be applied on the conductor. Insulation of the leads should be removed
immediately before the crimping. Conductors surface shall be cleaned and shall not be
left open.
6.00 TESTING :
6.01 Before energizing, the insulation resistance of every circuit shall be measured from
phase to phase and from phase to ground. This requires 3 measurements if one side is
grounded and 6 measurements for 3 phase circuits.
6.02 Where splices or terminations are required in circuits rated above 600 volts, measure
insulation resistance of each length of cable before splicing and / or terminating. Repeat
measurements after splices and / or terminations are complete.
6.03 Measure the insulation resistance of directly buried cable circuits before cable trenches
are back filled. Repeat measurement after back filling.
6.04 D.C. High voltage test shall be made after installation on the following :
(1) All 1100 volts grade cables in which straight through joints have been made.
(2) All cables above 1100 Volt grade. For record purposes test data shall include the
measured values of leakage current verses time.
The D.C. High voltage test shall be performed as detailed below :
Cables shall be installed in final position with all the straight through joints
complete.
Terminations shall be kept unfinished so that motors switchgear, transformer etc. are not
subjected to test voltage.
The test voltage and duration shall be as per relevant codes and practices of Indian
Standard Institution.
6.05 PROFORMA FOR TESTING CABLES :
DATE OF TEST
(a) Cable No. ……………………………………….
201
CONTRACTOR NLUO
(b) Drum No. from which cable taken : ……………………………
(c) Cable from ……………………………….. to : …………………………..
(d) Length of run of this cable …………………………………………… metre.
(e) Insulation resistance test :
(i) Between core - 1 to earth …………………………… M
(ii) Between core - 2 to earth …………………………… M
(iii) Between core - 3 to earth ……………………………. M
(iv) Between core - 1 to core - 2 ……………………….. M
(v) Between core - 2 to core - 3 ……………………….. M
(vi) Between core - 3 to core - 1 ……………………….. M
(f) High voltage test Voltage Duration
TECHNICAL SPECIFICATION FOR EARTHING INSTALLATION
The installation shall generally conform to I.S. 3043-Indian Standard Code of practice for
Earthing, as amended upto date.
1. Earthing Electrode :
The earthing electrode shall be galvanized steel pipe of class B medium quality 60 mm
dia bore and 3.0 M long. A hole shall be provided at 100 mm (4”) from the top end to
receive a 13 mm (1/2”) dia galvanished bolt and the bottom end shall be chisel cut for
easy penetration into soil.
Alternate layers of Charcoal or Salt and coke to be provided for Electrode as per I.S.
code of Practice unless specified otherwise.
One No. SWG G.I. wire (unless otherwise specified) shall be connected securely on the
properly cleaned surface at the top end of pipe electrode by means of a 100 mm (4”) long
x 13 mm (1/2”) dia G.I. bolt nut and double washers. The earth lead conductor shall be
protected mechanically be means of a continuous length of G.I. pipe (Class A) having 13
mm (1/2”) inside diameter upto a height of 0.60 M (2‟) above ground and the same shall
be completely filled with bitumen compound and topped upto overflowing.
2. Masonry Inspection Pit :
The inspection pit for the earth station shall be approx 0.56 M x 0.56 M (1‟-10” x 1‟-
10”) outside dimensions and approx. 0.45 M (1‟-6”) deep when completed, having 5”
thick cement brick work with 1st class bricks in cement mortar (6 : 1) both inside and
outside plastering 19 mm (3 / 4”) thick and neatly cemented 1.60 mm (1 / 16”) thick,
202
CONTRACTOR NLUO
both inside, outside and top. The opening on top shall be provided with a C.I. ring with
lockable cover fixed flush with ground surface.
All the excavations shall be duly back filled, dressed and rammed.
3. Locations for Earth Electrodes :
Electrodes shall be buried at least 2 M (6‟-6”) away from the building pole or object to
be earthed. However, earthing electrodes for L.C. installations should be as clode to the
down conductors as possible.
Electrodes when installed in parallel, shall not be placed less than 2 M (6”-6”) apart and
preferably placed at distances greater then twice their lengths.
4. Earth Busbar :
(a) Galvanised M.S. Flat :
The Busbar shall be of suitable size and length, as specified in the Schedule of items,
heavily galvanized and having adequate number of drilled and tapped holes 30 mm
apart, completed with G.I. bolts, nuts, washers for securely connecting the earth leads
and earth continuity conductors. The busbar shall be fixed on wall, having clearance of 6
mm from wall with spacing insulators with at least the numbers 13 mm (1/2‟) G.I. rag
bolts spaced about 0.46 M (1‟6”) apart.
(b) Copper Flats :
To be used, as specified, in the Schedule of Items, where earthing requirement are more
stringent. Brass bolts, nuts washers shall be used for connections.
5. Value of Earth Resistance :
Incase of installations where the load does not exceed 5 K.W. the resistance to earth shall
on no account exceed 5 K.W. the resistance shall not exceed 1 ohm.
For sub-station, the value is 1 ohm.
For L.C. installations the value is 1 ohm.
TECHNICAL SPECIFICATION FOR OUTDOOR TYPE
POWER DISTRIBUTION BOARD
Supply of Outdoor type, Self Standing, Floor mounted, Lockable, Gasketed, vermin proof
Feeder Pillars made out of 2 mm thick MS sheet steel (with MS Angle Frame for strength), Rain
Protected through canopy (3 mm thick sheet steel), duly painted with two coats of Red-Oxide &
two coats of Grey enamel paint having 3 mm thick removable, bottom entry gland plate
confirming IP-51.
1. 3 Ph, 4 wire Aluminium Bus Bars of sufficient rating shall be charged from Incoming
SFU with FR PVC insulated multi-strand, flexible annealed copper conductor wires,
ECKO / FINOLEX / HAVELLS / L&T make of suitable size. The Aluminium bus bars
shall be mounted on suitable support insulators. Bus bars shall be insulated with heat
shrinkable sleeves.
203
CONTRACTOR NLUO
2. Incoming to SFU shall be taken from Aluminium Bus-Bars with multi-strand, FR-PVC
insulated annealed copper conductor wires (ECKO / FINOLEX / HAVELLS / L&T) of
suitable rating.
3. Wiring form outgoing SFU‟s shall be done through HR-PVC insulated, multi-strand,
tinned copper conductor wires of suitable size up to coloured terminal connectors
(Elmex / Essen / Connect well make). 10% extra connectors are to be provided and
mounted on the rail.
4. All the wires shall be terminated with proper size of copper lugs having colour coded
PVC sleeves.
5. Feeder pillar shall have an Earthing Bus of sufficient rating. Feeder Pillar shall have
provision of earthing at 02 points with minimum 10 mm stud. Continuity of earthing to
doors shall be done through flexible copper braided conductor.
6. Panel shall have sturdy & fine wire-mesh for Air Natural cooling.
7. Panel shall be provided with minimum two number 1-bolts for lifting of the Panel.
8. Panel shall have hinged type, lockable front doors with pad locking facility.
9. Panel shall have enough space for termination of one number incoming armoured, HR-
PVC insulated, Aluminium conductor cable of suitable size and 5/3 + 3 Number out
going through armoured, HR-PVC insulated Aluminium conductor cable of suitable size
through double compression cable glands.
10. Panel shall have suitable Panel Illumination Lamp having control through separate
MCB.
11. Drawing shall be got approved before manufacturing.
12. Vendor to give BOQ, GA Drawing (showing dimensions) of the panel offered indicating
catalogue number of each component offered.
204
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR PACKAGE SUBSTATION WITH
BREAKER AS PROTECTION ON HT SIDE
1.0.0 CODE & STANDARDS:
1.1.0 All equipment and material shall be designed manufactured and tested in accordance
with the latest applicable IEC standards. The 12KV Package Substation Design must
be as per IEC 61330/62271-202.
1.2.0 The Package Sub-station offered shall in general comply with the latest issues
including amendments of the following standards.
Title Standards
High Voltage Low Voltage Pre-Fabricated Substation IEC:61330/
62271-202
High Voltage Switches IEC 60265
Metal Enclosed High Voltage Switchgear IEC 60298/
IEC62271-200
High Voltage Switchgear IEC 60694
Low Voltage Switchgear and Control gear IEC 60439
Power Transformers IEC 60076
2.0.0 DESIGN CRITERIA
2.1.0 Package Sub-station consisting of 11KV Non-Extensible SF6 Ring Main Unit with
breaker as protection + Transformer + Low Voltage Switchgear +APFC Panel
with all connection accessories, fitting & auxiliary equipment in an Enclosure to supply
Low-voltage energy from high-voltage system as detailed in this specification. The
complete unit shall be installed on a substation plinth (base) as Outdoor substation
located at very congested places. 11KV Isolators controls incoming-outgoing feeder
cables of the 11KV distribution system. The Vacuum Circuit Breaker shall be used to
control and isolate the 11kV/433V Distribution transformer. The transformer Low
Voltage side shall be connected to Low Voltage switchgear. The connection cables to
consumer shall be taken out from the Low Voltage switchgear.
2.2.0 The prefabricated-package substation shall be designed for a) Compactness, b) fast
installation, c) maintenance free operation, d) safety for worker/operator & public.
2.3.0 The Switchgear and component thereof shall be capable of withstanding the
mechanical and thermal stresses of short circuit listed in ratings and requirements
clause without any damage or deterioration of the materials.
2.4.0 For continues operation at specified ratings temperature rise of the various switchgear
components shall be limited to permissible values stipulated in the relevant standard
and / or this specification.
205
CONTRACTOR NLUO
2.5.0 Service Conditions:
The Package substation shall be suitable for continuous operation under the basic
service conditions indicated below
Ambient Temperature: 50 Deg C
Relative Humidity upto 95%
Altitude of Installation upto 1000m
The Enclosure of High Voltage switchgear-control gear, Low Voltage switchgear-
control gear & Transformer of the package substation shall be designed to be used
under normal outdoor service condition as mentioned. The enclosure should take
minimum space for the installation including the space required for approaching
various doors & equipment inside.
3.0.0 SPECIFIC REQUIREMENT
3.1.0 The main components of a prefabricated- package substation are Transformer, High-
voltage switchgear-control gear, Low-voltage switchgear-control gear and
corresponding interconnections (cable, flexible , bus bars ) & auxiliary equipment. The
components shall be enclosed, by either common enclosure or by an assembly of
enclosure. All the components shall comply with their relevant IEC standards.
3.1.1 Ratings:
Description Unit Value
Rated Voltage / Operating kV rms 11
Voltage
Rated frequency & Number of Hz & nos. 50 & 3
phases
Rated maximum power of kVA 315kVA/500kVA/630kVA/750kVA
substation /990kVA/1250kVA.
Rated Ingress protection class IP: IP-23 for Transformer Compartment
of Enclosure and IP:54 for LT & HT Switchgear
Compartment.
Rated temp Class of K10 upto 1250kVA
Transformer K20 from 1500kVA to 2000kVA
Compartment
HV Insulation Level
Rated withstand voltage at kV rms 28
power frequency of 50 Hz
Rated Impulse withstand kV peak 75
Voltage
HV Network & Busbar
Rated current Amp 630A
Rated short time withstand kA rms / 20
current 3 sec
Making capacity for switch- kA peak 50kA
disconnector & earthing
switches
206
CONTRACTOR NLUO
Breaking capacity of Isolators A 630A
(rated full load)
As per requirement.
LV Network
OUTDOOR ENCLOSURE
3.2.0 Outdoor enclosure:
3.2.1 The outdoor enclosure shall be made of galvanized Sheet Steel tropicalised to local
whether conditions.
3.2.2 The metal base shall ensure rigidity for easy transport & installation.
3.2.3 Substation will be used in outdoor application hence to prevent enclosure from
rusting/corrosion, welding should be avoided.
3.2.4 The protection degree of the Enclosure shall be IP54 for LT & HT switchgear
compartment & IP23 for Transformer compartment. Proper / adequate ventilation
aperture shall be provided for natural ventilation by way of Louvers etc.
3.2.5 To avoid the entry of rodent in the transformer compartment, stainless steel mesh
should be provided from inner side of louvers.
3.2.6 Considering the outdoor application of the substation the doors shall be provided with
proper interlocking arrangement for safety of operator and to avoid corrosion door
should have stainless steel hinges. Door should be provided with stoppers.
3.2.7 Interconnection between HT switchgear and transformer shall be using 1Cx3x95
sq.mm al. unarmoured XLPE cable and between transformer and LT switchgear shall
be using busbar.
3.2.8 Internal Fault : Failure within the package substation due either to a defect, an
exceptional service condition or mal-operation may initiate an internal arc. Such an
event may lead to the risk of injury, if persons are present. It is desirable that the
highest practicable degree of protection to persons shall be provided. The Design shall
be tested as per IEC61330/62271-202. Type test report of arcing due to internal
fault should submitted with offer.
3.2.9 Covers & Doors : Covers & doors are part of the enclosure. When they are closed,
they shall provide the degree of protection specified for the enclosure. Ventilation
openings shall be so arranged or shielded that same degree of protection as specified
for enclosure is obtained. Additional wire mesh may be used with proper Danger board
for safety of the operator. All covers, doors or roof shall be provided with locking
facility or it shall not be possible to open or remove them before doors used for normal
operation have been opened. The doors shall open outward at an angle of at least 90 0 &
be equipped with a device able to maintain them in an open position.
3.2.10 Earthing : All metallic components shall be earthed to a common earthing point. It
shall be terminated by an adequate terminal intended for connection to the earth system
of the installation, by way of flexible jumpers/strips & Lug arrangement. The
continuity of the earth system shall be ensured taking into account the thermal &
207
CONTRACTOR NLUO
mechanical stresses caused by the current it may have to carry. The components to be
connected to the earth system shall include :
a) The enclosure of Package substation,
b) The enclosure of High voltage switchgear & control gear from the terminal provided
for the purpose,
c) The metal screen & the high voltage cable earth conductor,
d) The transformer tank or metal frame of transformer,
e) The frame &/or enclosure of low voltage switchgear,
3.2.11 There shall be an arrangement for internal lighting activated by associated switch for
HV , Transformer & LV compartments separately.
3.2.12 Labels: Labels for warning, manufacturer‟s operating instructions etc. shall be durable
& clearly legible.
3.2.13 Cleaning & Painting :
The paints shall be carefully selected to withstand tropical heat and rain. The paint
shall not scale off or crinkle or be removed by abrasion due to normal handling.
208
CONTRACTOR NLUO
TECHNICAL SPECIFICATION OF 11KV SF6 METAL ENCLOSED, INDOOR
RING MAIN UNIT (RMU).
This RMU should be complete with all components necessary for its effective and
trouble free operation along with associated equipment etc. such components should be
deemed to be within the scope of supplier‟s supply.
The RMU should be fixed type SF-6 insulated, Vacuum circuit breakers with O/C &
E/F relay for the protection of the transformer. It should be maintenance free
equipment, having stainless steel robotically welded IP67 enclosure.
4.0 STANDARDS AND REFERENCE DOCUMENTS
4.1 Codes and Standards
The RING MAIN UNIT (RMU) should be designed, manufactured and tested
according to the latest version of:
IEC 60694 Common specifications for high-voltage switchgear and control gear
standards.
IEC 60298/ IEC 62271-200 : A.C metal-enclosed switchgear and control gear for rated
voltages above 1KV and up to and including 72KV and the IEC Codes herein referred.
IEC 60129/ IEC 62271-102: Alternating current disconnections (isolators) and earthing
switches
IEC 60529 : Classification of degrees of protection provided by enclosures
IEC 60265 High-voltage switches-Part 1: Switches for rated voltages above 1kV and
less than 52 kV
IEC 60056 : Circuit breakers
IEC 60420 High-voltage alternating current switch-fuse combinations
IEC 60185 Current transformers
IEC 60186 Voltage transformers
IEC 60255 Electrical relays
considered provided that they fully comply with IEC standards.
The design of the switchgear should be based on safety to personnel and
equipment during operation and maintenance, reliability of service, ease of
maintenance, mechanical protection of equipment, interchangeability of
equipment and ready addition of future loads.
4.2 Salient Technical feature of “SF-6 RMU.”
11KV SF6 INDOOR, NON-EXTENSIBLE, Ring Main Unit (RMU), comprising of 2
Nos. 630A Load break Switches, 1No. 630 A Vacuum “T”OFF Circuit Breaker with (3
O/C & 1E/F ) Relays.
(A)Load break switch (630A)
Load break switch should have the following
209
CONTRACTOR NLUO
- Manually operated 12 KV, 630A Load Break switch and Earthing Switch with
making
capacity
- “Live Cable” LED Indicators through Capacitor Voltage Dividers mounted on the
bushings.
- Mechanical ON/OFF/EARTH Indication
- Anti-reflex operating handle
- Cable testing possible without disconnection of cables.
- Cable boxes suitable for 1 X 3C x 300 sq mm XLPE Cable with right angle Cable
terminal Protectors.
- Cable boxes should be Arc Proof and interlocked with respective Earthing Switches.
For
safety of operator it should not be possible to open the cable box unless the earth
switch is ON.
(B) Circuit Breaker. ( 630A)
Circuit Breaker should have the following:
- Manually operated 630 A Vacuum circuit breaker and Earthing Switch with making
capacity
- Mechanical tripped on fault indicator
- Auxiliary contacts 1NO and 1NC
- Anti-reflex operating handle
- “Live Cable” LED Indicators thru Capacitor Voltage Dividers mounted on the
bushings.
- 3O/C + 1E/F self powered relay with Low and High set for Over current and Earth
Fault. Relay should have facility to display the maximum loaded phase current also.
Relay should have facility to trip the breaker from remote commands without shunt
trip coil.
- Mechanical ON/OFF/EARTH Indication
INDOOR RMU
1. Modular design, panel type with front cable access.
2. RMU must be made of robotically welded stainless steel with all live parts inside
stainless steel tank
3. Offered RMU must be Non extensible.
4. Maximum Modules can be accommodated in a single Stainless steel Tank so as to
make it more compact and reliable.
5. Cable covers must be interlocked with Earth switch to have complete safety of
operating person.
4.3 DIELECTRIC MEDIUM
SF6 GAS shall be used for the dielectric medium for 11KV RMU‟s in accordance with
IEC376. It is preferable to fit an absorption material in the tank to absorb the moisture
from the SF6 gas and to regenerate the SF6 gas following arc interruption. The SF6
insulating medium shall be constantly monitored via a temperature compensating gas
pressure indicator offering a simple go, no-go indication.
The RMU should have provision of Gas filling at site , in case there is some leakage of
the gas.
210
CONTRACTOR NLUO
4.4 GENERAL TECHNICAL REQUIREMENTS
4.4.1 Fixed type Vacuum breakers insulated in SF6 gas. It should be maintenance free,
having stainless steel robotically welded enclosure for INDOOR RMU application.
4.4.2 Low gas pressure devices- 1.4 Bar pressure. RMU should have full rating with 0.0 Bar
gas pressure.
4.4.3 Live cable indicators- High operator safety.
4.4.4 Fully Rated integral earthing switch for Switches and Breakers.
4.4.5 Self powered Microprocessor Based 3O/C + 1E/F self powered relay with Low and
High set for Over current and Earth Fault - Does not require any external source of
power.
4.4.6 Units fully SCADA Comaptible. Retrofitting at site possible at a later date. Line
switches ( Load break switches) as well as T- OFF circuit Breaker can be operated by
remote.
4.4.7 Cable boxes should be front access and interlocked with earth switch. No rear
access required.
4.4.8 Cable testing possible without disconnection of cables.
4.4.9 Compact in dimension.
4.4.10 Low pressure, sealed for life equipment,
4.4.11 Cable earthing switch on all switching device-standard, for operator safety.
4.4.12 All live parts should be inside a hermetically sealed Stainless Steel
enclosure for indoor RMU.
4.4.13 Indoor unit should be classified as sealed pressure system with gas leak rate of
less that 0.1% per year requiring no gas filling for 30+ years of functional life.
4.5 TECHNICAL AND GUARANTEED PARTICULARS.
The bidders shall furnish all guaranteed technical particulars as called for this
specification.
5.0 DESIGN CRITERIA
5.1 Service conditions
The offered switchgear and control gear should be suitable for continuous operation
under the basic service conditions indicated below. Installation should be in normal
indoor conditions in accordance with IEC 60694.
Ambient temperature -1oC to +45oC
Relative humidity up to 95%
Altitude of installation up to 1000m, IEC 60120
5.2 General structural and mechanical construction
The offered RMU should be of the fully arc proof metal enclosed, free standing,
floor mounting, flush fronted type, consisting of modules assembled into one or more
units. Each unit is made of a cubicle sealed-for life with SF6 and contains all high
voltage components sealed off from the environment. The overall design of the
switchgear should be such that front access only is required. It should be possible to
erect the switchboard against a substation wall, with HV and LV cables being
terminated and accessible from the front.
The units should be constructed from stainless steel sheets. The design of the units
should be such that no permanent or harmful distortion occurs either when being
lifted by eyebolts or when moved into position by rollers.
211
CONTRACTOR NLUO
The cubicle should be have a pressure relief device. In the rare case of an internal
arc, the high pressure caused by the arc will release it, and the hot gases is allowed to
be exhausted out at the bottom of the cubicle. A controlled direction of flow of the
hot gas should be achieved.
The switchgear should have the minimum degree of protection (in accordance with
IEC 60529)
- IP 67 for the tank with high voltage components
- IP 2X for the front covers of the mechanism
- IP 3X for the cable connection covers
6.0 TECHNICAL DATA
6.1 Ring Main Unit, Electrical data
Electrical data and service conditions
No Rated voltage KV 12KV
1 Power frequency withstand voltage KV 28
2 Impuls withstand voltage KV 95
3 Rated frequency Hz 50
4 Rated current busbars A 630
5 Rated current (cable switch) A 630
6 Rated current (T-off) A 630
Breaking capacities:
7 active load A 630
8 closed loop (cable switch) A 630
9 off load cable charging (cableS
witch) A 135
10 earth fault (cable swich) A 200
11 earth fault cable charging (cable switch) A 115
12 short circuit breaking current (T-off circuit breaker) kA 20
13 Rated making capacity kA 50
14 Rated short time current 3 sec. kA 20
Ambient temperature:
15 Maximum value °C + 50
16 Maximum value of 24 hour mean °C + 35
17 Minimum value °C 0
18 Altitude for erection above sea level 4m ...1000
19 Relative humidity Max 95%
6.2 Ring Main Unit Technical data(11KV) INDOOR
General data, enclosure and dimensions
1 Standard to which Switchgear complies IEC
2 Type of Ring Main Unit Metal Enclosed, Panel type, Compact
Module.
3 Number of phases 3
4 Whether RMU is type tested Yes
5 Whether facility is provided with pressure relief Yes
6 Insulating gas SF6
212
CONTRACTOR NLUO
7 Nominal operating gas pressure 1.4 bar abs. 20° C
8 Gas leakage rate / annum % 0.1% per annum
9 Expected operating lifetime 30 years
10 Whether facilities provided for gas Yes, temperature compensated manometer
monitoring can be delivered
11 Material used in tank construction Stainless steel sheet
No Operations, degree of protection and colours
1 Means of switch operation separate handle
2 Means circuit breaker operation separate handle and push
buttons
3 Rated operating sequence of Circuit Breaker O –3min-CO-3min-CO
4 Total opening time of Circuit Breaker approx. . 40-50ms
5 Closing time of Circuit Breaker approx. . 30-45ms
6 Mechanical operations of switch CO 1000
7 Mechanical operations of CO earthing switch 1000
8 Mechanical operations of circuit breaker CO 2000
9 Principle switch / earth switch 3position combined switch
Degree of protection:
10 High Voltage live parts, SF6 tank IP 67
11 Front cover mechanism IP 2X for Indoor
12 Cable covers IP 3X for Indoor
Colours:
14 Front cover 7035
15 cable cover 7035
7 .0 PANEL(MODULE) DESCRIPTION
7.1.1 Incoming cable module
It should be consist of an SF6 cubicle housing a switch disconnector and an earthing
switch. Bus bars and all electrical connections are located inside the tank. The
operating shafts for the switches should be have rotary seals where they enter the
SF6 cubicle. The operating mechanisms should be located outside on the front of
the SF6 tank. Cable bushings should be located on the front of the SF6 cubicle in a
separate cable compartment. Front covers containing the mimic diagram and having
a degree of protection IP2XC close the fronts.
7.1.2 The T-off circuit breaker module (630 A )
The T-off circuit breaker module should be consisting of an SF6 cubicle housing a
Vacuum circuit breaker unit and a disconnector- ear thing switch. An integrated
relay and related CTs is used for tripping of the circuit breaker. Bus bars and all
electrical connections should be located inside the tank. The operating shafts for the
switches should be have rotary seals where they enter the SF6 cubicle. The
operating mechanisms are located outside on the front of the SF6 tank. Cable
bushings should be located on the front of the SF6 cubicle in a separate cable
compartment. Front covers containing the mimic diagram having a degree of
protection IP2X seal off the fronts.
Off load isolator shall be provided after the Vacuum circuit breaker for maintenance
purpose.
213
CONTRACTOR NLUO
7.2 CIRCUIT BREAKERS
Vacuum bottles should be use as interrupters of the currents. The circuit breaker
main circuit should be connected in series with a three-position disconnector –ear
thing switch. The operation between circuit breaker and disconnector ear thing must
be interlocked.
1.VCB must self tripping and has a self powered relay
2.The RMU must be nonextensible type
8 OTHER MAIN FEATURES
8.1 Bus bars
Comprising the 3 single phases copper bus bars and the connections to the switch or
circuit breaker. The bus bar should be integrated in the cubicle Bus bars should be
rated to withstand all dynamic and thermal stresses for the full length of the
switchgear.
8.2 The cable switch
It should be a switch-disconnector and ear thing switch using SF6 gas as an arc-
quenching medium. The switch positions are closed – open – earthed. In the open
position the switch satisfies the disconnector requirements.
8.3 Earthing Switch
Earthing switches should be rated equal to the switchgear rating.
Earthing switches should be quick make type capable of making Rated Fault Current.
Ear thing switch should be operated from the front of the cubicle by means of a
removable handle.
8.4 The mechanisms
All mechanisms should be situated in the mechanism compartment behind the front
covers outside the SF6-tank. The mechanism for the switch and the earthing switch is
operating both switches via one common shaft. The mechanism provide independent
manual operation for closing and opening of the switch, independent closing of the
earthing switch and dependent opening of the earthing switch.
The mechanism for the T-off switch and earthing switch is operating both switches
via one common shaft. The mechanism has stored spring energy and provide
independent manual operation for closing and opening of the switch, independent
closing of the ear thing switch and dependent opening of the ear thing switch. The
mechanism for the vacuum circuit breaker (VCB) and disconnector- earthing switch
is operating the VCB and the disconnector earthing switch via to separate shafts. The
mechanism for the VCB has stored spring energy and provides independent manual
operation for closing and opening of the VCB. The mechanism has a relay with
related CT‟s and/or remote tripping device. The mechanism for the disconnector
earthing switch provide independent manual operation for closing and opening of the
disconnector, independent closing of the earthing switch and dependent opening of
the earthing switch.
214
CONTRACTOR NLUO
8.5 Front covers
The front cover contains the mimic diagram of the main circuit with the position
indicators for the switching devices. The voltage indicators are situated on the front
panels. Access to the cable bushings is in the lower part of each module.
8.6 Position indicators
The position indicators are visible through the front cover and are directly linked to
the operating shaft of the switching devices.
8.7 Voltage indicator
The voltage indicators are situated on the front cover, one for each module, and
indicate the voltage condition of each incoming cable. Identification of the phases is
achieved with labels L1, L2 and L3 on the front of the voltage indicators. The
voltage indicator satisfies the requirements of IEC61243.
8.8 Cable compartment
It should be possible to terminate up to a 1x 3c x300sqmm core HV cables in each
cable compartment. The access to the compartment will be possible by removing the
cable cover, Hinged to the main frame only when earth switch is ON. Cable
Compartments of Indoor RMU should be Arc Proof and interlocked with respective
Earth Switches.. Each module has a separate cable compartment that is segregated
from each other by means of a partition wall. A partition wall should be fitted to
divide the cable compartment from the rear side of the switchgear. In case of an arc
inside the tank, followed by the opening of the pressure relief, the partition wall
prevents the hot gases flowing out from the pressure relief to enter the cable
compartments. All covers are removable. The ground continuity is achieved when
the covers are in place by means of Hinged connections.
Interconnection between HT switchgear and transformer shall be using 1Cx3x95
sq.mm Al. unarmoured XLPE Cable.
8.9. Power connection.
The cables are installed in the dedicated compartment below the mimic front cover.
At the bottom of the cable compartment, an earthing bar system made of copper/GI
with a minimum cross section of 120 mm2 should be fitted. In each compartment the
earthing bar should be fitted with 4 screws M10. The earthing system is connected to
the tank by a copper/GI bar, which rises up to the connecting point of the tank behind
the rear partition wall on the middle of the switchgear.
8.10 INTERLOCKING.
The mechanism for the cable switch should be provide a built in interlocking system
to prevent operation of the switch when the earthing switch is closed, and to prevent
operation of the earthing switch when the switch is in the closed position.
The mechanism for the T-off switch should be provide a built in interlocking system
to prevent operation of the switch when the earthing switch is closed, and to prevent
operation of the earthing switch when the switch is in the closed position. The
mechanism for the VCB and the disconnector-earthing switch should be has a built in
215
CONTRACTOR NLUO
interlocking system to prevent operation of the disconnector-earthing switch when
the VCB is in the closed position.
Further is should not be possible to Open the Cable doors unless the Earthing Switch
is Turned ON. In case the Cable door is accidentally left open a positive interlock
shall prevent operation of Load Break Switch and Isolators / Breaker from any
operation.
8.11 Current Transformers
All current transformers should be complying with IEC 60185.
Current transformers should be of dry type, with ratings and ratios as required.
Cable current transformers used in circuit breaker modules should be maximum
100mm wide. Current transformers used in metering cubicles should be having
dimensions according to DIN 42600, Narrow type. Current transformer shall be
placed in the cable covers so that it can be easily replaced at site without removing
the bushings.
8.12 Auxiliaries.
The switchgear should be prepared for options like motor operation, auxiliary
contacts and short-circuit indicators. Necessary terminal blocks and wiring etc.
should be placed behind the front cover of each module.
8.13 Fault Passage Indicators.
These shall facilitate quick detection of faulty section of line. The fault indication
may be on the basis of monitoring fault current flow through the device. The unit
should be self-contained requiring no auxiliary power supply. The FPI shall be
integral part of RMU to avoid thefts. The FPI shall have clear display, automatic
reset facility and shall be SCADA compatible.
9 TESTING AND CERTIFICATION.
9.1 TYPE TESTS.
Units should be type tested in accordance with IEC standards 60056, 60129, 60265,
60298,60420,60529 and 60694. The following type tests should perform on the HT
Switchgear and report should submit with offer.
- Short time and peak withstand current test
- Temperature rise tests
- Dielectric tests
- Test of apparatus i.e. circuit breaker and earthing switch
- Arc fault test
- Measurement of resistance of main circuit.
- Mechanical endurance test.
- Duty cycle test.
- Internal arc test for HT chamber.
- Type test reports for above type shall be submitted with the offer.
9.2 ROUTINE TESTS.
Routine tests should be carried out in accordance with IEC 60298 standards. These
tests should be ensure the reliability of the unit.
216
CONTRACTOR NLUO
Below listed test should be performed as routine tests before the delivery of
units;
- Withstand voltage at power frequency
- Measurement of the resistance of the main circuit
- Withstand voltage on the auxiliary circuits
- Operation of functional locks, interlocks, signalling devices and auxiliary devices
- Suitability and correct operation of protections, control instruments and electrical
connections of the circuit breaker operating mechanism
- Verification of wiring
- Visual inspection
- Time travel characteristics measurement facility for Breaker should be available
with the manufacturer to asses the quality of RMU.
DISTRIBUTION TRANSFORMER
10.0 Oil filled Transformer :
10.1.1 Requirement: 11000/433 Volt Oil immersed hermetically sealed, corrugated tank and
without conservator type design ONAN cooled suitable for installation at outdoor in Enclosure
for ground mounting.
10.1.2 Voltage Ratio: No load voltage 11000/433 volts within tolerance as stipulated in IEC
76.
10.1.3 Rating: The transformer shall have a continuous rating as specified at any of the
specified tapping position and with the maximum temperature rise specified.
10.1.4 Temperature Rise: The maximum temperature rise at the specified maximum
continuous output shall not exceed 40C by thermometer in the hottest portion of the
oil or 50C measured by resistance of winding above ambient temperature, not
exceeding 40C daily average or 50C maximum.
10.1.5 Connections: H.V. Delta and L.V Star connected with neutral brought out on the
secondary side for connection to earth; Vector group DYn11.
10.1.6 Tapping :
Each transformer shall be provided with sliding/rotary type tap switch so as to
provided for a voltage adjustment on H.V. from +5% to –5% of rated voltage of 11000
volts in 4 equal steps (5 position) to obtain rated voltage of 433 volts on LV side. Refer
clause no:4.5.4 for details of rotary switch. The tapping shall be provided for following
voltage ratios at no load.
10.2.1 Cleaning & Painting :
a) All steel surfaces shall be thoroughly cleaned by sand blasting or chemical agents, as
required to produce a smooth surface free of scales, grease and rust.
b) The internal surfaces in contact with insulating oil shall be painted with heat resistant
insulation paint which shall not react & be soluble in the insulating liquid used.
217
CONTRACTOR NLUO
c) The external Surfaces, after cleaning, shall be given two coats of high quality epoxy
based rust resisting primer followed by filler coats.
d) The transformer shall be furnished with coats of weather resisting battleship gray
epoxy based enamel paint specially recommended for transformer use.
e) The paints shall be carefully selected to withstand tropical heat rain, effect of
proximity to the sea etc. The paint shall not scale off or crinkle or be removed by
abrasion due to normal handling.
f) Special care shall be taken by the manufacturer to ensure against rusting of nuts,
bolts and fittings during operation. All bushings and current carrying parts shall be
cleaned properly after final painting.
10.2.2 Both H.V. and L.V. bushings shall have creepage corresponding to very heavily
polluted atmosphere.
10.2.3 Oil: New transformer oil used shall be according to relevant IEC standards
10.2.4 Phase Marking & Danger Plate: Phase markings in fluorescent paint on small non-
corrodible metallic tags shall be permanently fixed for H.V. and L.V sides. Phase
markings tags shall be properly fixed with proper alignment. Danger plates shall be
provided on the H.V & LV sides, mentioning the Corresponding Voltages.
10.3 Core and Coil :
10.3.1 Core : The core shall be constructed from high grade, cold rolled, non-ageing, low loss,
high permeability, grain oriented, cold-rolled grain oriented silicon steel laminations.
The transformer shall be so designed as to have minimum humming noise. The
percentage harmonic potentials with the maximum flux density under any conditions
shall be such that capacitors connected in the system shall not be overloaded.
10.3.2 The core and coil assembly shall be securely fixed in position so that no shifting or
deformation occurs during movement of transformer. The core and coil assembly shall
be capable of withstanding without injury, the thermal and mechanical effects of short
circuit at the terminals of any winding.
10.3.3 Noise: The Contractor shall take special precautions to ensure that the noise and
vibration level does not exceed which is obtained in good modern practice.
10.3.4 Impedance Volts: The Percentage impedance value at 75 Deg. C at any tap shall be as
per IS/ IEC subject to tolerance as specified in relevant IEC standards. i.e. 4.5% upto
630kVA and 5% upto 1250kVA The value of the impedance volts at each tapping over
the specified range shall be specified in the bid.
10.3.5 Regulation: The regulation at 75 C at full load at unity and 0.8 power factor subject to
the usual tolerance as per IEC standards shall be specified in the bid.
10.3.6 Power Freq. High Voltage & Insulation Level (Impulse voltage): The distribution
transformer shall be designed so that they are capable of withstanding high voltage &
impulse voltages as given below:
a) Impulse Voltage for 11kV winding: 75 kV (1.2/50 Microsecond wave shape).
b) High Voltage : 28kV rms.
218
CONTRACTOR NLUO
10.4.0 RATINGS (Summary) :
Application Dist. Tfr. with Corrugated Tank
4.4.1 Service Outdoor
Step down
4.4.2 Type Oil immersed corrugated tank
4.4.3 Cooling system ONAN
4.4.4 No. of Phases 3
4.4.5 No. of winding per phase 2
4.4.6 Rated output (MVA) HV / LV
With ONAN cooling
4.4.7 Rated voltage in KV (Line HV-11 kV
to Line LV-0.433 kV
4.4.8 Rated frequency 50 Hz
4.4.9 Temperature rise above
50C
A In winding by resistance 50C or above
B In Oil by thermometer 40C or above
4.4.10 Guaranteed losses at 75C
and at normal tap position
as pe IS tol.
315kVA 500kVA 630kVA 750kVA 990kVA 1250kVA
A No Load loss (W) 600 850 1000 1150 1700 1450
B Full Load loss (W) 4250 5750 7200 7800 8650 14500
C Total loss (W) 4850 6600 8200 8950 10350 15950
4.4.11 Insulation level
A H.V. Power Freq. KV rms 28 kV
B H.V. (kVpeak ) Impulse 75 kV
C L.V. (kV) -
4.4.12 Vector Group Dyn11
4.4.13 Type of taps provided Off Load full capacity
A Taps provided on H.V. winding
B Range of taps ±5% in steps of 2.5% (4 steps, 5 position)
C Method of Tap Change Rotary /sliding Switch
control
D Manual load Yes „Off Circuit‟
4.4.14 Percentage impedance at 75 As per IS.
Deg. C
4.4.15 System earthing
A H.V. Solidly earthed
B L.V. Solidly earthed
4.4.16 Terminal arrangement
A H.V. From H.V. Bushing on Top.
B L.V. From L.V. Bushing on Top.
219
CONTRACTOR NLUO
C L.V. Neutral From L.V. Neutral Bushing on Top.
4.4.17 Transformer-bushing voltage
class 12 kV class
a) H.V. (kV) 1.1kV class
b) L.V. (kV)
4.4.18 System fault level
a) H.V. side 500 MVA (11 kV)
b) L.V. side -
4.4.19 Short circuit withstand 3 sec.
capability duration
4.4.20 L.T.sideC.T. ratings
A
Current Ratio As per Application
B
Class of Accuracy 1.0
C
Burden 5 VA
D
Type Resin cast ring type
10.5.0 Fittings & Accessories For Corrugated Tank Transformer :
10.5.1 The following accessories shall be provided for 11 kV/0.433 kV, distribution
transformer.
10.5.2 Two earthing terminals with copper lugs. The lugs shall be provided in such a way that
they shall not obstruct the movements of rollers. The earthing continuity for all the
connected equipments shall be properly done.
10.5.3 Two lifting lugs for complete transformer as well as enclosure.
10.5.4 Off circuit tapping switch shall be rotary/sliding type, 3 pole gang operated, top
mounting draw out type only. Tap switch shall be suitable for operating voltage of 11kV
and above and shall have rated current of 16.53A/26.54A/39.64Amps. Switch shall be
provided with externally operating hand wheel handle with indicator and locking device,
with direction changing facility and locking arrangement. Bidders shall submit with the
bid, technical catalogue for the off load tap switch for Purchaser‟s approval.
10.5.5 Rating plate and diagram plate of durable non-corroding metal giving information as
required under IEC 76. Rating plate shall also include Transformer Actual %Z, No-
Load Loss & Full-Load Loss at 75C along with details like Purchase Order Number,
date. The name plate marking shall be done with fluorescent colour. Each equipment
shall carry individual name-plate with proper instructions & affixed with screws.
10.5.6 Four plain rollers fitting so that the transformer can suitably moved in any direction
along with roller direction changing and locking facility shall be provided.
10.5.7 Skid with Haulage lugs.
10.5.8 Instructions & affixed with screws.
220
CONTRACTOR NLUO
10.5.9 Skid with Haulage lugs.
OR
10.0 Cast Resin Dry Type Transformer
This specification covers the requirements of design, manufacture, testing and supply of
cast resin dry type transformers complete with all the accessories and fittings for
efficient and trouble-free operation.
10.1 CODES & STANDARDS
The equipment covered by this specification shall, unless Other wise stated to be
designed, constructed and tested in accordance with latest revisions of relevant Indian
standards / IEC publications.
IS 1271 - Classification of Insulating Materials.
IS 2026 - Power transformers (part I - V)
IS 2099 - Bushing for alternating voltages above 1000 V
IS 2705 - Current transformers
IS 3202 - Code of practice for climate proofing
IS 3639 - Power transformer fittings and accessories
IS 4257 - Porcelain bushings for transformers
IS 11171 - Dry type Transformer
IS 8478 - Application guide for tap-changers
IS 10028 - Code of practice for selection, installation and
maintenance of transformers.
10.2 GENERAL DESIGN FEATURES
10.2.1 All transformers shall be of the latest design, dry type Cast Resin only.
10.2.2 The type of cooling shall be Natural Air cooled (AN) and the corresponding ratings
for ach transformer shall be as indicated in the specific requirements.
10.2.3 Each transformer shall be suitable for operation at full rated power on all tapings
without exceeding the applicable temperature rise.
10.2.4 It shall be possible to operate the transformer satisfactorily, with the loading guide
specified in IS-6600. There shall be no limitations imposed by bushings, tap changers,
auxiliary equipment to meet this requirement.
10.2.5 The transformers shall be designed to be capable of with-standing, without injury, the
thermal and mechanical effects of short-circuits between phases or between phase and
earth at the terminals of any winding with full voltage applied across the other winding for
221
CONTRACTOR NLUO
periods given in relevant standards. There shall be no limitations imposed by any
part/component of the transformer/off load tap links to meet the short circuit level
Specified.
10.2.6 Each transformer shall be designed for minimum no-load and load losses within the
economic limit and shall be able to have minimum loss at the rated load condition.
10.2.7 All electrical connections and contacts shall be of ample cross sections for
carrying the rated current without excessive heating.
10.2.8 The transformer shall be capable of continuous operation at full load rating under the f
ollowing conditions.
a) Voltage variation =  10%
b) Frequency variation =  5%
c) Combined voltage and frequency variation (Absolute sum) = 10%
10.3 CONSTRUCTION
10.3.1 The transformer shall be dry type, AN cooled suitable for Compact substation
application.
10.3.2 The core-clamping frame shall be provided with lifting eyes having ample strength to lift
the complete core and winding assembly.
10.3.3 Off circuit tapings shall be provided on the HV windings. Tap changing is done by
means of off-circuit links accessible through openings provided.
10.3.3 The lifting lugs and rollers shall be provided. A winding temp. Scanner shall be provided
and is actuated by means of resistance temperature detectors embedded in LV windings
of all three phases. It should have alarm and trip contacts at a specified temperature.
10.3.4 The transformer shall be of IP00 protection class and will be installed in the
transformer compartment of compact substation having IP23 protection class.
10.4 WINDINGS
10.4.1 The winding insulation shall be of Class „F” and temperature rise limit to Class F. i.e. 90
deg. C
10.4.2 Windings shall be of electrolytic copper conductors (circular in shape) of high
conductivity and 99.9% purity.
10.4.3 Windings shall be designed to withstand the specified thermal and dynamic short circuit
stresses.
10.4.4 The windings shall be duly sectionalised. Accessible joints brazed or welded and
finished smooth shall connect similar sections. No corona discharge shall result on the
winding upon testing the transformer for induced voltage test as specified in IS.
10.4.5 The end turns of the high voltage windings shall have reinforced insulation to take care
of the voltage surges likely to occur during switching or any other abnormal condition.
222
CONTRACTOR NLUO
10.4.6 The high voltage and low voltage winding are shall be made of copper Conductors. HV
winding will be always be resin casted under vacuum while LV winding can either be
casted or pre-impregnated with resin.
10.5. CORE
10.5.1 The double wound Core shall be constructed from non-ageing cold rolled Grain oriented
steel sheets. The built core shall be painted with high temperature resistant paint to
prevent corrosion at the edges of core plates and to withstand high temperatures. By
using different core material optimisation of core losses shall be achieved. The yokes
shall be firmly clamped between yoke channels or plates. The top & bottom yoke frames
shall be secured to each other by means of tie-rods, which help in securing the winding
in place.
10.5.2 The design of the magnetic circuit shall be such as to avoid static discharges,
development of short circuit paths within itself or to the earthed clamping structure and
the production of flux component at right angles to the planes of laminations which may
cause local heating.
10.6 OFF-CIRCUIT TAP CHANGING LINKS
10.6.1 Off circuit tapings are provided on HV windings. Tap changing is done by means off
circuit links. Use of tap changing links eliminates any moving parts as against a
manually operated tap changer.
10.7 Terminal Arrangement
HV side and LV side of transformer will have the top busbar arrangement for
connection of HT side by means of cable and LT side by means of busbar.
223
CONTRACTOR NLUO
10.8 Technical particulars of dry type transformer
SR.
NO.
DESCRIPTION PARTICULARS
01 Type Three Phase, 50 Hz, Core type, two winding,
Cast Resin Dry type Transformer
02 Rating ( KVA ) 315kVA/400kVA/500kVA/630kVA/750kVA/1
000kVA/1250kVA/1500kVA/2000kVA
03 Winding material Copper
04 No load voltage ratio 11 / 0.433
05 Connection
a) HV Delta
b) LV Star with neutral
06 Vector group Dyn 11
07 Insulation level (KVp/ KVrms)
a) HV 75 / 28
b) LV -/ 03
09 Type of Tap Changer for giving voltage Off ckt tap links
variation to HV
10 Tapping range +5 % to –5 % in step of 2.5%
11 Temperature rise winding 90 °C
over ambient temperature
12 Class of Insulation Class „F‟
13 Enclosure IP 00 ( Without Enclosure )
14 Method of Cooling AN (Air Natural)
15 No load losses at rated voltage &
frequency (IS Tol.)
16 Full load loss at principle tap at 75 º C
(IS Tol.)
17 Termination
HV Busbar
LV Busbar
18 Fittings for Dry type 2 Numbers Earthing Terminals, Rating and
Diagram Plate, Bi-Directional Rollers, Lifting
Lugs, Winding Temp Scanner.
19 Paint Enamel-RAL 7032 (Siemens Grey)
10.8. PAINTING
10.8.1 All steel surfaces shall be thoroughly cleaned by sand blasting or chemical
agents as required to produce a smooth surface free of scale, grease and rust
10.8.2 The external surface, after cleaning, shall be given a cost of high quality red
oxide or yellow quoted primer, followed by filler coats.
10.9 Routine Test
All Routine Tests in accordance with IEC 60076 / IS 2026 shall be carried out
on each transformer.
224
CONTRACTOR NLUO
L.T. PANEL
11.1 System:-
a) Declared voltage :– 3 Phase,400V (±6%) 50 Hz,
b) Neutral :– Solidly earthed at substation.
c) Busbar – Aluminum
11.2 General finish:- Tropical, totally enclosed, metal-clad, weather-proof, vermin and dust
proof.
11.3 Construction :
Enclosure:- Dead Front type of enclosure shall be able to provide the degree of
Protection IP:4X.
11.4 Circuit Ways:
315kVA/500kVA Transformer – Incomer – 800A,3P,50kA ACB
Outgoing – 3 Nos. 200A, 3P, 36kA MCCB
2 Nos. 250A, 3P, 36kA MCCB
630kVA/750kVA Transformer - Incomer – 1000A/1250A, 3P, 50kA ACB
Outgoing – 5 Nos. 250A, 3P, 36kA MCCB
990kVA Transformer - Incomer – 1600A,3P,50kA ACB
Outgoing – 5 Nos. 320A,3P,36kA MCCB
1250kVA Transformer - Incomer – 2000A,3P,50kA ACB
Outgoing – 3 Nos. 400A,3P,36kA MCCB
2 Nos. 630A,3P,36kA MCCB.
Air Circuit breaker will be of 3P,50KA fixed manual microprocessor based over current,
short circuit and earth fault release. Moulded case circuit breaker will be of 3P,35kA fixed
manual thermal overload and magnetic short circuit release protection.
OR
Moulded case circuit breaker will be of 3P,35kA fixed manual microprocessor based Overload
and short circuit release.
The design of the LT panel should be type tested for the short circuit, temperature & Ingress
protection test and type test report should submit with offer.
11.5 GENERAL CHARACTERISTICS OF ACB
11.5.1) Conformity with Standards
The air circuit-breakers used in low voltage installations are constructed and tested in
accordance with the IEC 947/IS 947 Standards and respect the following EC directives:
– “Low voltage Directive” (LVD) No. 73/23 EEC
– “Electromagnetic compatibility Directive” (EMC) No.89/336 EEC
11.5.2) Functional characteristics
– The circuit-breakers must have a rated service voltage of 690 V AC and a rated
225
CONTRACTOR NLUO
insulation voltage of 1000 V.
– The circuit-breakers must have a rated impulse withstand voltage of 12 kV.
– The rated uninterrupted current must be between 800 and 6300 A with the possibility
of selection of ratings from 400 A.
– Different versions shall be available with rated ultimate short circuit breaking
capacity(Icu) from 50kA at 415V and shall have rated short circuit service breaking
capacity(Ics) equals to Icu.
– Different versions of circuit-breakers shall be available with rated short-time
withstand current (Icw -1 sec) for 50kA for 1sec in category B.
– It must be possible to supply the circuit-breakers both from the top and bottom
terminals without derating their performances and without jeopardising their
functionality.
– The mechanical life must be at least 12000 operations, without the need for
maintenance of the contacts and arcing chambers.
– The electrical life at a voltage of 440 V AC must be and without the need for
maintenance of the contacts and arcing chambers:
– at least 9000 operations up to 2000 A
– at least 6000 operations up to 3200 A
these values are intended to bevalid only for CAT B circuit-breakers.
11.5.3) Environmental characteristics
– Operating temperature: -25 °C...+70 °C (-13 °F...158 °F)
– Storage temperature: -40 °C...+70 °C (-40 °F...158 °F)
– Altitude: operation without derating up to 2000 m a.s.l. (6600 ft), and with derating up
to 5000 m a.s.l. (16500 ft)
– Suitability for use in a hot-humid environment. With regard to this, the circuit-
breakers must undergo a tropicalisation process which makes them suitable for use in
a hot-humid environment, as established by the prescriptions of the main shipping
registers and in accordance with the international IEC 60068-2-30 Standards.
11.5.4) Construction characteristics
– The circuit-breaker structure must be made of steel sheet.
– There must be total segregation between power and front shield, using double
insulation where suitable so as to guarantee maximum operator safety.
– Total segregation between the phases must be guaranteed for safety reasons.
– The main contacts must be separate from the arcing contacts in cat. B circuit-breakers
only.
– It must be possible to inspect easily the arcing chambers easily and to check main
contact wear with the circuit-breaker racked-out, by removing the arcing chambers.
– All the circuit-breakers in the range have the same height and depth with the aim of
standardising the supporting structures of the switchgear and the switchgear itself as
far as possible.
– The circuit-breakers must indicate the precise position of the main contacts and the
condition of springs charged/discharged on the front, by means of certain and reliable
signals.
– The operating mechanism must be of the stored energy type with operation by means
of precharged springs fitted with antipumping device. The springs are charged
manually by activating the front lever, or by means of a geared motor, supplied on
request.
226
CONTRACTOR NLUO
– The whole range of air circuit-breakers must be fitted with electronic protection
releases. It must be allowed the interchangeability of protection releases from skilled
personnel.
- ACBs shall have minimum watt losses in order to restrict temperature rise inside the
breaker.
11.5.5) RELEASES
1) Release (Protection functions)
– The release must not require auxiliary power supplies since the power is taken from
the current transformers.
– The signals supplied by the release must not operate with power supply supplied by
internal batteries.The basic version of the release must provide:
– protection against overload with trip with inverse long time delay (L)
– protection against instantaneous short-circuit (I)
– Selective short-circuit (S)
– Earth fault (G)
The setting ranges shall be:
– Protection against overload (L)
Characteristic t=k/I2
Trip threshold I1=(0.4...1)xIn with timing adjustable from 3 to 144 sec. (value
referred to a current equal to 3xI1)
– Protection against selective short-circuit (S)
Characteristics t=k and t=k/I2
Trip threshold I2=(1...10) xIn with timing adjustable from 0.1 to 0.8 sec.
(value referred to a current equal to 10xIn for curves at t=k/I2 and referred to currents
>I2 for curves at t=K)
– Protection against instantaneous short-circuit (I)
Trip threshold I3=(1,5...15) xIn
– Protection against earth fault (G)
Characteristics t=k and t=k/I2
Trip threshold I4=(0.2...1) xIn with timing adjustable from 0.1 to 0.8 sec. (value
referred to a current equal to 4xI4)
– Neutral protection level:
50% - 100% - 200% - excluded
All the protection functions except protection against overload must be excludable
User interface and signalling LEDs
– The release shall allow parameterisation of the trip thresholds and timing by means of
dipswitches.
– alarm and trip signalling for all the protection functions by means of LEDs located on
the release shall be available. No batteries or external power supplies shall be
necessary for powering these indicators. The indication shall be available for not less
than 48 hours after the trip, even with the circuit-breaker open
– An alarm shall indicate by means of LEDs located on the release the disconnection of
opening solenoid and current transformers. A trip shall also occur, after a short time
227
CONTRACTOR NLUO
delay, when the disconnection is detected.
– It shall be possible, with the aid of external devices, to read currents, and information
on last 10 trips (currents, protection tripped) occoured to the unit.
11.6 General aspects of MCCB with Thermal Base release
Standards conformity
Molded case circuit-breakers (MCCB) installed in the low voltage plant must be
designed,
manufactured and tested according with the international standards IEC 60947-1, IEC
60947-2,
IEC 60947-3, IEC 60947-4-1, IEC 61000 or with the corresponding harmonized
national standards, the CE “Low Voltage Directives” (LVD) n° 73/23 EEC and
“Electromagnetic
Compatibility Directive” (EMC) n° 89/336 EEC.
11.6.1 Molded case circuit breakers functional features
– Rated insulation voltage (Ui) for MCCB shall be 800 V AC or more.
– Rated Impulse withstand voltage (Uimp) for mccb‟s shall be 8kV.
– Rated service voltage(Ue) for the moulded case circuit breaker shall be standard as
690V, however performance on short circuit level shall be consider based on system
operating voltage.
– Rated uninterrupted current between varying from 160 and 800 A with trip units settings
starting from 1 A
– Rated short circuit breaking capacity shall be considered as per bill of material and the
rated service short circuit breaking capacity (Ics) shall be in 50-100% of rated ultimate
short circuit breaking capacity (Icu).
– According to IEC 60947-2 (§ 4.4) starting from 400 A the circuit breakers must be
category B, however other small rating category A shall be confirmed.
– MCCBs must be available with different ultimate short breaking capacities between
16kA and 200kA @ 380/415 V AC.
– Both line up and line down supplying must be possible without decreasing MCCBs
performances or functionality
– MCCB shall confirm to current limiting type and this feature shall ensure less amount of
let through energy at the time of opening on fault. The mccb shall have opening time less
then 10msec for current rating upto 800A
– A test bottom for the correct functionality checking (moving contacts opening) must be
place in front of the breaker.
11.6.2 Ambient characteristics
– Operating temperature: -25 °C .. +70 °C (ambient temperature)
– Storage temperature: -40 °C .. +70 °C (ambient temperature)
228
CONTRACTOR NLUO
– Reference temperature for setting the thermal element of the thermo magnetic trip unit:
+40 °C
– Maximum relative humidity: 98%
– Maximum altitude: 2000 m above sea level, 5000 m above sea level with derating
– Suitability for being used in hot-humid places.
11.6.3 Construction characteristics
– The range of moulded case circuit-breakers must cover a range of rated uninterrupted
currents from 160 to 800 A.
– By means of the double insulation technique, moulded case circuit-breakers must
guarantee complete separation between the power circuits and the auxiliary circuits.
– Moulded case circuit-breakers must have an operating lever which always indicates the
exact position of the circuit-breaker contacts (positive operation), by means of safe and
reliable signals (I= closed, O= open, yellow-green line= open due to trip unit).
– Moulded case circuit-breakers must be suitable for isolation in compliance with § 7.2.7
of the IEC 60947-2 Standard. This indication must be clearly and indelibly marked on
the circuit-breaker (in accordance with § 5.2 of IEC 60947-2) and in a position where it
is visible with the circuit-breaker installed.
– Moulded case circuit-breakers with rated uninterrupted current up to 250 A shall have a
45 mm high face which makes them suitable for installation on modular panels.
– For the front parts of the circuit-breakers the degree of protection of at least IP20
(excluding the terminals) must be guaranteed.
11.6.4 Protection trip units
10.6.4.1 Thermomagnetic overcurrent trip units
– Thermomagnetic trip units shall be fitted with protection threshold against overload
(whose thermal element must consist of a bimetal) and with protection threshold against
short circuit.
– The protection threshold against overload must be continuously adjustable starting from
0.7 times the rated current of the trip unit and up to its rated value.
– The reference temperature for setting the thermal element of the protection trip unit is
40°C. The temperature performance of the trip unit must be indicated as the temperature
varies.
– The protection threshold against short-circuit can be either the fixed or adjustable type
with continuity from 5 and up to 10 times the rated current of the trip unit. For current
rating upto 250Amps, magnetic threshold be minimum of 10 times of rated current.
11.6.4.2 Magnetic only overcurrent trip units
– The overcurrent trip units with magnetic only threshold shall be suitable for protection
against short-circuit.
229
CONTRACTOR NLUO
– The adjustable magnetic only trip units (suitable for motor protection) shall only be
available in the three-pole version, whereas those with fixed threshold shall also be
available in the four-pole version.
– The adjustable magnetic only trip units must be available for circuit-breakers up to 250
A with an upper magnetic threshold equal to Im =3200
OR
11.6 General aspects of MCCB with microprocessor based release
Standards conformity
Molded case circuit-breakers (MCCB) installed in the low voltage plant must be
designed, manufactured and tested according with the international standards IEC
60947-1, IEC 60947-2, IEC 60947-3, IEC 60947-4-1, IEC 61000 or with the
corresponding harmonized national standards, the CE “Low Voltage Directives” (LVD)
n° 73/23 EEC and “Electromagnetic
Compatibility Directive” (EMC) n° 89/336 EEC.
11.6.1 Molded case circuit breakers functional features
– Rated insulation voltage (Ui) for MCCB shall be 800 VAC or more.
– Rated Impulse withstand voltage (Uimp) for mccb‟s shall be 8kV.
– Rated service voltage(Ue) for the moulded case circuit breaker shall be standard as
690V, however performance on short circuit level shall be consider based on system
operating voltage.
– Rated uninterrupted current between varying from 160 and 3200 A with trip units
settings starting from 10A
– Rated short circuit breaking capacity shall be considered as per bill of material and the
rated service short circuit breaking capacity (Ics) shall be in 100% of rated ultimate short
circuit breaking capacity (Icu). (Ics=Icu)
– According to IEC 60947-2 (§ 4.4) starting from 400 A the circuit breakers must be
category B, however other small rating category A shall be confirmed.
– MCCBs must be available with different ultimate short breaking capacities between
16kA and 200kA @ 380/415 V AC.
– Both line up and line down supplying must be possible without decreasing MCCBs
performances or functionality
– MCCB shall confirms to current limiting type and this feature shall ensure less amount
of let through energy at the time of opening on fault. The mccb shall have opening time
less then 10msec for current rating upto 630A, and less them 15msec for current rating
upto 1600Amps.
– A test bottom for the correct functionality checking (moving contacts opening) must be
place in front of the breaker.
230
CONTRACTOR NLUO
11.6.2 Ambient characteristics
– Operating temperature: -25 °C .. +70 °C (ambient temperature)
– Storage temperature: -40 °C .. +70 °C (ambient temperature)
– Maximum relative humidity: 98%
– Maximum altitude: 2000 m above sea level, 5000 m above sea level with derating
– Suitability for being used in hot-humid places.
– Circuit-breakers fitted with electronic trip units must comply with the prescriptions of
the International Standards on electromagnetic compatibility.
11.6.3 Construction characteristics
– The range of moulded case circuit-breakers must cover a range of rated uninterrupted
currents from 160 to 3200 A.
– By means of the double insulation technique, moulded case circuit-breakers must
guarantee complete separation between the power circuits and the auxiliary circuits.
– Moulded case circuit-breakers must have an operating lever which always indicates the
exact position of the circuit-breaker contacts (positive operation), by means of safe and
reliable signals (I= closed, O= open, yellow-green line= open due to trip unit).
– Moulded case circuit-breakers must be suitable for isolation in compliance with § 7.2.7
of the IEC 60947-2 Standard. This indication must be clearly and indelibly marked on
the circuit-breaker (in accordance with § 5.2 of IEC 60947-2) and in a position where it
is visible with the circuit-breaker installed.
– Moulded case circuit-breakers with rated uninterrupted current up to 250 A shall have a
45 mm high face which makes them suitable for installation on modular panels.
– The same depth must be guaranteed from 320 A up to 1000 A, in order to standardize
both switchboards and their supports.
– All the installation positions must be possible without jeopardizing the function of the
apparatus. Starting from 630 A up to 1600 A the withdrawable version shall be mounted
and operated horizontally.
– For the front parts of the circuit-breakers the degree of protection of at least IP20
(excluding the terminals) must be guaranteed.
11.6.4 Protection trip units
– From the 250 A size circuit-breakers, the trip unit must be interchangeable.
Electronic overcurrent releases
– The electronic overcurrent trip units must be self-supplied and must be able to guarantee
correct operation of the protection functions even in the presence of a single phase
supplied with a current value equal to 20% of the phase current.
– They must be unaffected by electromagnetic interference in compliance with the EMC
directive on the matter.
231
CONTRACTOR NLUO
– The basic version shall be fitted with protection functions against overload (function L)
and against short-circuit. The latter function can either be of the instantaneous type
(function I) or, alternatively, with intentional delay (function S). The function of
protection against short circuit must be excludable. A basic version shall also be
provided with only the protection threshold against instantaneous short-circuit which
cannot be excluded.
– The minimum performances of the protection functions of the electronic protection trip
unit for distribution, where present, must be:
1. Function L:adjustable trip threshold I1= (0.4...1) x In, trip curves for the basic
version with times from 3 to 12 seconds – 2 different trip curves - (at 6 times the
set threshold). Cannot be excluded.
2. Function S: adjustable trip threshold I2= (1...10) x In, trip curves for the basic
version with times from 0.1 to 0.25 seconds – 2 different trip curves – (at 8 times
the rated current of the trip unit.Can be excluded.
3. Function I: adjustable trip threshold I3= (1...10) x In for the basic version
(instantaneous trip). Can be excluded.
– All the protection functions must be characterized by threshold and time tolerances
according to the International Standards.
– The size of the current sensors must be a minimum of 10 A to a maximum of 3200 A so
as to cover the widest possible current range.
12.0 TECHNICAL REQUIREMENTS OF CAPACITOR BANK
12.1 The Capacitor units shall comply with IS 13340 / IEC 831 for self healing type and
other components such as Contactors, MCCB‟s, MCB‟s HRC Fuses etc., shall comply
with the latest versions of relevant Indian Standards.
12.2 The Capacitor units shall be CPRI / ERDA tested.
12.3 RATINGS:
The rating of the Power Factor Correction equipment shall be 3 phase, 50Hz, 440volts :
APFC kVAr = ( As per Cusrtomer requirement)
12.4 OPERATING LIMITS / OVERLOADS
12.4.1 Each capacitor shall meet the following requirements:
a) Maximum permissible over-voltage: Each capacitor shall be capable of operating
continuously at 110% of the rated voltage (3 phase, 440V, 50 Hz ).
b) Maximum permissible over current: The permissible increase in current loading due
to any or all of the following shall not exceed 30% of the rated current:
232
CONTRACTOR NLUO
1.Increased voltage
2.Increased frequency
3.Non-sinusoidal voltage.
c) Test voltage: All routine tests shall be conducted at 2.15 Un for each element as well
as the assembled capacitor unit.
d) The capacitors shall be suitable for operating in temperature category:-25/D (
Category: Max.Temp. 55 0C ) as per relevant IS / IEC temperature catelgoy.
12.5.0 CAPACITOR CELLS (MANUFACTURE & CONSTRUCTION):
12.5.1 Individual Capacitors shall be madeup of single phase elements internally delta
connected to form a 3-phase capacitor Heavy Duty Metallised Polypropylene as a
dielectric with electrodes of special material.
12.5.2 The capacitor shall be provided with safety device in the form on INTERNAL FUSE .
12.5.3 Capacitors shall be contained in heavy duty metallic enclosure. The capacitors shall be
provided with Thermal equalizers & the Heat Dissipation shall be through conduction
via metal enclosure.
12.5.4 Dielectric material shall have loss less than 0.5 watts per KVAR. This shall enable
longer life and lower capitalization of losses in the long run.
12.5.5 The capacitors shall have current carrying capability of 200 x In and there shall be no
need for providing inrush current limiting inductor coil.
12.5.6 The encapsulation medium shall be a thermo-plastic material.
12.5.7 Nominal design life of individual capacitor cells shall be 15 years.
12.5.8 The capacitor shall have threaded terminals for wire connection OR cables brought out
for direct termination on contactors.
12.6 DISCHARGE RESISTORS
12.6.1 Capacitor cells shall be provided with discharge resistors to reduce residual voltage to
less than 50 volts within one minute of disconnection
12.6.2 Resistors shall be chosen to ensure a 20 year minimum life.
12.7 CONTROLS:
All controls shall be mounted on enclosure door for easy inspection and service.
12.8 Automatic POWER FACTOR CONTROLLER / Relay :
12.8.1 The APFC RELAY shall be microprocessor based VAR Sensing type and not PF or
current sensing type. Controller shall be able to sense the reactive current requirement
and switch on the required VAR providing intelligent switching based on actual value
of KVAR and Bank Sizes
12.8.2 The relay shall have LED display
12.8.3 The relay shall be easily programmable from front panel itself.
12.8.4 It shall have provision of both Auto and manual operation.
12.8.5 A built in settable time delay function shall be provided and the controller shall have
provision to automatically set itself for a time delay of 40 – 60 secs in the event of
Power Outage.
12.8.6 C/K ratio shall be automatically settable
12.8.7 The switching sequence shall be so chosen as to minimize the wear and tear of
contactors. The equal step of capacitors shall be switched in rotation to achieve this
feature.
233
CONTRACTOR NLUO
12.8.8 The relay shall be able to recognize the connection of CT and Voltage and be able to
automatically adjust itself to the phase angle difference.
12.8.9 The relay shall be 144 x 144 mm dimensions
12.8.10 It shall be single phase sensing type
12.8.11 The target PF setting range shall be 0.8 lead to 0.8 lag.
12.8.12 The operating temperature shall be upto 70 deg C.
12.9 SWITCHGEAR COMPONENTS:
12.9.1 CAPACITOR DUTY CONTACTORS: Heavy Duty Contactors shall be used. These
shall be suitable for capacitor switching of 25 / 50 KVAR capacity. The contactors
shall be able to withstand 200 In inrush currents. The contactors shall be provided with
damping resistors.
12.9.2 INCOMER MCCB: Each panel shall be provided win the an incomer MCCB of
adequate rating and shall be provided with overload and short circuit release. The short
circuit breaking capacity of the MCCB shall be 50 KA.
12.9.3 STEP PROTECTION: Each step of capacitor panel shall be provided with adequately
rated Fuses.
13.0 Earthing:
Earthing arrangement shall be provided for earthing each cable, PVC cable gland,
neutral busbar, chassis and frame work of the cubicle with separate earthing terminals at
two ends. The main earthing terminals shall be suitably marked .The earthing terminals
shall be of adequate size, protected against corrosion, and readily accessible. These shall
be identified by means of sign marked in a legible manner on or adjacent to terminals.
Neutral bus bar strip shall be connected to Earthing terminal with help of GI strip of
suitable capacity & nut-bolt arrangement.
Note: The agencies to fallow-up the necessary co-ordination to the Government
authority required for installation for the different requirement.
234
CONTRACTOR NLUO
TYPE / ROUTINE TEST ON PACKAGE SUBSTATION
14.0. TYPE TESTS FOR THE PACKAGE SUBSTATION:
14.1 The Package Substations offered must be type tested as per IEC 61330/62271-202. The
copy of
type test summary should be submitted along with the tender.
14.2 Routine Tests: The routine tests shall be made on each complete prefabricated
substation.
a) Voltage tests on auxiliary circuit.
b) Functional test.
c) Verification of complete wiring.
14.3 Test Witness: Routine test shall be performed in presence of Owner‟s representative if
so desired by the Owner. The Contractor shall give at least fifteen (15) days advance
notice of the date when the tests are to be carried out.
14.4 Test Certificates:
Certified reports of all the tests carried out at the works shall be furnished in three (3)
copies for approval of the Owner.
14.5 Performance Certificate to Qualify Technical Bid :
14.5.1 Manufacturer should submit Type test report of CPRI or equivalent agency for Fault
current rating of at least 20 kA for VCB and Internal arc, IP Type report for sub Station
Enclosure in the technical offer.
235
CONTRACTOR NLUO
SECTION -XV
STANDARD SPECIFICATION
All work under this contract shall be carried out in accordance either the technical
specification given in the documents if any part of the specification is not given in
this document and the latest issue of the Indian Standard Specification applicable
to the particular class of work. If Indian standard specification are not formulated for
any particular materials of work, the relevant British Standard Specification shall
apply. Relevant issue I.S. Specification shall be applicable to the particular work have
been described along with the specification for the respective works. In case of any
confusion or dispute regarding the meaning and interpretation of any specification
for the respective works. the decision of the NLUO/ Architect shall be final and
binding on the contractor.
236
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR SANITARY AND PLUMBING WORKS
The following specifications are to be read in conjunction with the details given in
the schedule of quantities.
1.0 Standard Specifications : All works under this contract shall be carried out in
accordance with the technical specifications & the latest issue of the Indian
standard Specifications applicable to the particular class of work. If Indian
Standards are to not formulated for any particular material of work, the relevant
British Standards shall apply, Relevant issues of I.S. Specifications applicable to the
particular work have been described along with the specification for the respective
works . In case of any confusion or dispute regarding the meaning and interpretation
of any specification for the respective works. In case of any confusion or dispute
regarding the meaning and interpretation of any specification for the respective
works, the decision of the Owner/Architects shall be final and binding on the
Contractors.
2.0 General Specification fro water supply. Sanitary Installations, sewerage & Drawing
works.
a. Execution through licensed Sanitary contractors Firm.
All water supply, sanitary installations, sewerage & drainage works shall be
executed through licensed sanitary contractors. Particulars of the firm viz.
Name & address of the firm. registration & license no etc. (Issued by the
authorities) shall be furnished along with the tender.)
b. Complying with by-laws etc. of local Authorities.
All water supply, Sanitary installations, sewerage & drainage works shall be
carried out by skilled and licensed plumbers/ technicians in a workman like
manner complying in all respects with the relevant by-laws of the Municipal or
of the local Authorities under whose jurisdiction the work has be executed.
c. Contractor's responsibility for sanction from local authorities.
For the works undertake by him & works dependent on his work, the
contractor shall prepare plans / drawings and get it sanctioned from the
Municipal or other Govt. Authorities as may be required by law, the contractor
shall include the cost for the same in his tender rates unless otherwise
specified in the tender Items.
d. Contractor's responsibility to ensure continuance of existing services.
During execution of the new works , the Contractor should ensure that the
existing services (viz. water supply, sewer, drain Lines etc.) are not
disrupted in any way & in case it happens accidentally the services shall be
restored immediately at contractor's cost.
However, when in the opinion of the Architects/NLUO, it is imperative to
locally divert/ Disconnect for a short time/reconnect the existing lines, it shall
be done by the Contractor as directed by the Architect/NLUO. Payment for
the necessary pipe lines would be made as per tender items, however all other
costs including temerity measures shall be borne by the contractor.
3.0 Documents to be enclosed along with the final bill :
237
CONTRACTOR NLUO
3.1 Completion Dressings : On completion of all works under his contract, the contractor
shall prepare & submit (At his own cost) 3 sets (1. Blue print or Drawing on treating
cloth & 2. Ammonia prints of each drawing ) of completion drawings, showing the
entire system of water supply, sanitary installations, drainage & sewerage disposal
incorporating up to date changes (If any) at site in all the works mentioned above
& permanent structures, roads, pathways, boundary lines etc.
The following drawing ( In scales as instructed by the Architects) shall be prepared
and submitted to the Architects along with the contractor's final bill :
The following drawings ( In scales as instructed by the Architects ) shall be
prepared and submitted to the Architects along with the Contractor's final bill.
a. Site layout (Sewerage & Drainage Lines)
b. Any other drawings as required any instructed to be done by the Architects.
3.2 List of materials / installations handed over : on completion of works in all respects
and satisfactory testing , the contractor shall prepare & submit a list , along with the
final bill of all materials / installations handed over to the authorized representative
of owner.
3.3 Transfer of Manufacture's guarantee : When manufacturers guarantee period for any
material/ installation expired at a letter date then that of the expiry date of the
defect liability period of the contractor, the contractor shall transfer the guarantee
in the name of the owner this transfer should be made at the item of submitting
the contractor's bill for release of retention money.
4.0 Cement : The cement must be kept in dry place under cover, Samples of cement
may be taken by the Architects/Owner from time to time for testing at any
approved laboratory whose reports shall be accepted by both parties.
5.0 Sand : Sand is to be clean, coarse and sharp and is to be washed, if so directed.
6.0 Aggregate : The aggregate for the reinforced cement concrete work shall be stone
chips or broken gravel of approved quality which will pass through 12mm. mesh but
be retained on 6mm mesh.
The aggregate for the support or drain pipes, manhole chambers etc. shall be of
stone chips of 20mm & down size.
7.0 Concrete : For reinforced cement concrete work the cement, sand and aggregate shall
be in the proportion of (1:2:4) for foundation work, the mix will be in the
proportion of ( 1:3:6) whenever reinforced cement concrete (RC.C.) is mentioned in
schedule of quantities, it shall mean inclusive of cost of steel reinforcement bars,
providing & removing shuttering etc. all complete.
8.0 Bricks : Bricks shall be of the best quality will burnt sound, hard & giving clear
ringing tone of sound when struck against each other and well shaped bricks having
crushing strength so kg/sq. cm. unless stated otherwise in the respective schedule of
items of standard dimensions and to be soaked for at least six hours in water
before use.
9.0 Brick work : The brick work shall be in English bond, and shall be laid in cement
sand mortar in the proportion of (1:6), if not mentioned otherwise. Where
corbelling is necessary, projection in each course shall not exceed (2 1/4") 57mm.
All brick work must be kept wet till the mortar will fully set.
10.0 Soling : For soling, the bricks shall be having crushing strength 75 kg/sq. cm.,
bricks laid flat, the joints being well packed with loose sand.
11.0 a) Excavation general : Excavation shall generally form part of the item under
the schedule and shall not be paid for separately unless otherwise specified
in the schedule of quantities. It includes excavation in all kinds of soil
including shoring and bailing out water where necessary and refilling the
excavated trenches, in 15 cm layers properly rammed and watered and neatly
dressed at top. If the excavation is done to dimensions greater than those
238
CONTRACTOR NLUO
shown on the drawings or as directed by the Architect /NLUO, the excess
depth shall be made good at the cost of the contractor. The excavation work
should be done in a manner that does not in any way endanger the stability of
the adjacent buildings or other structure or services. Where any road. Pavement
of crossing are cut these shall be restored to their original conditions at no
extra cost. Moreover after completion of the work the contractor shall have
to dress the site including disposal of the surplus earth at their own cost as
directed by the Architect/NLUO.
b. Trenches, General : The width of the bed of trenches shall be the exact
width as show on the drawings or as specified.
In the firm soil , the sides of trenches shall be kept vertical up to a depth
of 1.82 meter and for a greater depth, the trench shall be widened be allowing
steps of 45cm (1'-6") on either side after every 1.82 M depth from bottom so as
to give side slopes of (1/4" to 1") 6 mm to 25mm. Where the soil is soft, loose
or slushy the width of steps shall be suitably increased as directed by the
Architect/NLUO. It shall be the responsibility of the contractor to take
complete instructions in writing from Architect/ Employee regarding the
stepping, sloping or shoring to be done for excavation in trenches deeper
than 1.83 M for firm sill or any depth for soft, loose of slushy soil.
The bed of the trenches shall be made level and firm by watering and
ramming. Any soft or defective spots that are found shall be filled with
concrete of the same proportion as specified or as may be directed by the
Architect/Owner.
12.0 Sanitary Installation:
a. Indian Type W.C. Pan : The W.C. pan shall be of white vitreous China of
specified size and pattern wash down type unless otherwise specified. It shall be
of back flush inlet type. The pan shall be of approved best quality and shall
bear the mark of the Manufacturer. The pan shall be provided with a 100 mm
C.I. ''P' or 'S' trap as specified in the item with minimum 50 mm seal.
b. Fixing : The W.C. pan shall be sunk or raise from the general floor as
specified, but its surrounding floor shall be sloped towards the pan. Care shall
be taken so that the pan is not damaged in the process of fixing ; if damaged
in any way, it shall be replaced immediately. It shall be fixed in a proper
cement concrete base of [1:3:6] proportion taking care that the cushion is
uniform and even without having any hollows between the concrete base and
pan.
The joint between the pan and the trap shall be made with cement mortar
[1:2] with jute hessian gasket soaked in coal tar and shall be leak proof.
13.0 European type W.C.
a. European type W.C. pan shall be readily flushed . of wash down type,
shall bear the mark of an approved firm and shall be of best quality. The
closet shall be of vitreous china ware having integrated trap 'p' or 's' type with
or without vent hole right or left as directed.
b. Seat :The seat with lid shall be of solid white plastic or approved colour or
as specified with rubber buffers and shall be fixed in position by using
chromium plated (C.P.) brass hinges and screws.
14.0 Urinal :
a) Lipped Front Urinal : The urinal shall be of flat back lipped front basin of
required dimensions of white vitreous chinaware of an approved make as
specified . It shall be fixed in position by using rawl plugs embedded in the
239
CONTRACTOR NLUO
wall with screws of proper size or fixed as per approved Manufacturer's
specification. Each urinal shall be connected to a 32 mm N.B. PVC waste pipe
with clamps which shall discharge into a channel or floor trap, or as specified.
b. Painting : The inside of the invisible portions of the fittings and brackets
connected with urinal basin shall be painted with approved bituminous paint
and outside of the brackets, etc. shall be painted with a priming coat of red
oxide to give an even shade to match the colour of surrounding walls. The
cost of such painting shall be included in the rate quoted for the concerned
tender items.
15.0 Flushing System
a) Only where specifically instructed for E.P.W.C.s and ODISHA type
I.P.W.C.s, low level type flushing cistern to be provided and shall be of white
vitreous chinaware of approved make, 10 liters capacity with internal
fittings, brackets and C.P. 40mm flush pipe & bend with rubber packing , brass
C.P. handle etc. The low level type flushing cistern shall be connected
with the W.C. pan by means of 40mm dia C.P. flush bend with rubber packing.
The inlet pipes shall be connected with brass C.P. heavy connector of required
length with both ends C.P. nuts & washers.
16.0 Wash Hand Basin
a) Wash Hand Basin : The basins shall be of white vitreous china of approved
pattern. The size of the basin shall be as specified. The basins shall be of
approved quality and make.
b) Fittings : Each wash hand basin shall be provided with pillar tap as specified,
having a centered tap hole with C.P. protruded nose pillar cock heavy type.
This must be included with 32 mm dia C.P. basin waste, C.P. Bottle trap &
concealed G.I. waste pipes (Or heavy PVC waster pipe of required length with
C.P. brass couplings) as stated in the respective Schedule of items.
c) Fixing : The circular basins shall be supported on counter top and the
rectangular basins shall be supported on a pair of C.I. concealed type brackets
embedded in wall or fixed in position by means of wooden cleats and screws
as required.
d) The waste pipes shall discharge into the floor trap inlet or as specified.
17.0 Sinks :
a) Sinks : The sink with drain board shall be of best quality stainless steel, make of
approved quality & brand . The size of the sink shall be as specified. The sink
shall be of approved quality.
b) Fixing : The sink shall be supported on M.S. fabricated on C.I. cantilever bracket
to match with sink profile. Embedded or fixed into position by means of
wooden cleats and screws or embedded in wall with concrete as per site
condition. The brackets shall be painted with approved shade and colour to
match with the surrounding finish.
c) The G.I. waste pipe shall discharge into floor trap inlet or as specified.
18.0 Toilet Requisites :
a) Mirrors : The piece glass mirrors shall of approved make glass as specified.
The size and shape of the mirror shall be as specified. It shall be mounted
on the asbestos sheet and shall be fixed in position by means of C.P. brass
dome shaped screws over rubber washers and rawl plug firmly embedded in
wall .
The plate glass mirrors of suitable shapes & size as per detailed drawings
shall be provided with accessories for round counter type basins.
240
CONTRACTOR NLUO
b) Water connection : water connection to flushing cistern, wash hand basins shall
be by means of white PVC connector or C.P. connector with stop cock as
specified in the respective items.
c) Shelf : Unless otherwise specified the shelf shall be of porcelain of approved
quality & design. The size of the shelf shall be as specified. The brackets
shall be fixed to the wall with C.P. brass screw to wooden plug firmly
embedded in the wall.
d) Urinal Partition : Unless otherwise specified partition for urinal shall be shape
out of 20mm thick x 900 mm white marble. Fixing shall be done by inserting
the portion approx 75mm inside wall & grouting the same in cement concrete
(1:3:6). All the exposed surfaces & edges shall be properly ground to shape and
polished. Joint with wall to be finished with white cement.
e) Towel Rail : The towel rails with bracket of brass C.P. or anodized aluminum as
stated in Schedule of Items shall be of approved shape and design. The size of the
rail shall be of approved shape and design. The size of rail shall be of approved
shape and design. The size of the rail shall be as specified. The brackets shall be
fixed by means of C.P. brass screws or Rawl plug firmly embedded in wall.
f) Paper Holder :- The paper holder shall be for white vitreous chinaware of recessed
type & the rate shall include chase cutting of walls, setting in cement sand mortar &
making good the all round joint with white cement.
19.0 P.V.C(SWR). soil , waste and vent Pipes and fittings:
a) P.V.C Pipes and fittings: The P.V.C pipe and fittings should be of I.S.I marked
pipes & fittings conforming to I.S 13592 -1992 Type A of latest editions, of
approved quality. The pipes shall be free from cracks and other flaws. The interior
of pipes and fittings shall be clean and smooth and painted inside with approved
anti-corrosive paint.
Nominal mass : The nominal mass and thickness of pipes are given below along
with Tolerance acceptable as per I.S. norms :
Wall thickness type -
Normal outside Tolerance on outside a
diameter diameter
MIN MAX
75 +0.3 1.8 2.2
110 +0.4 2.2 2.7
160 +0.5 3.2 3.8
b) Fixing : The pipes and fittings shall be fixed to walls by using proper clamps. The
pipes shall be fixed perfectly vertical or in a line as directed. All soil pipes shall be
carried up above the roof and shall have P.V.C vent cowl. Where pipes are laid
along walls, the P.V.C pipes are to be fixed 25mm away from the wall surface.
Fabricated M.S. flat with G.I. clamps and necessary nuts and bolts are to be used for
this purpose may be used only on specific instructions of of Architects / NLUO,
where diversions are to be provided. Payment for such fabricated M.S. clamps
/hangers shall be made separately as per Schedule of items.
The access door fittings shall be of proper design so as not to from any cavities in
which fill may accumulate. Doors shall be provided with brass bolts & rubber
insertions connections between main pipe and the branch pipes shall be mad by
using trenches and bends invariable with access doors for cleaning.
241
CONTRACTOR NLUO
In this method, instead of forming a socket on one pipe and spigot on other, an
injection moulded socket fitting or coupler is used, with a provision to take in the
pipes at both ends. After properly cleaning ends of both the pipes the solvent
cements are applied on the surfaces to be jointed and the joint ismade at ambient
temperature. Injection moulded fittings only shall be used in preference to
fabricated fittings. Only solvent recommended by the manufacturers of the pipes
shall be used and full load on the joints applied only after 24 hours. The pipe
shall be cut perpendicular to the axis of the pipe length with a metal cutting saw.
Pipe ends have to be beveled slightly with abeveling tool (Remer) at an angle of
about 30 degree. The total length of insertion socket (injection moulded socket or
couplet) shall be marked on the pipe and checked how far the pipe end could be
inserted into the fitting socket. Attempt shall be made to push the pipe to marked
distance, if not possible it shall at least be pushed for 2/3 of this distance.Dust,
oil, water grease etc. shall be wiped out with a dry cloth from thesurface. Further
the grease should be thoroughly removed with a suitable solvent, such as
methylene chloride or as an alternative the outside surface of the pipe and the
inside of the fitting may be roughened with emery paper. Generous coatings of
solvent cement shall be evenly applied on the inside of the fittings around the
circumference of the full length of insertion and on the outside of the pipe end up
to the marked line with a brush of suitable dimension. The pipe shall be pushed
into the fitting socket and held for 2minutes as otherwise the pipe may come out
of the fitting due to the slippery quality of cement and the tapering inside bore of
the fitting. The surplus cement on the pipe surfaces shall be wiped out. If the
solvent cement has proper and pipe will come out of the fitting. In summer
months joints shall be made preferably early in the morning or in the evening
when surrounding environment is cooler. This will prevent joint from pulling
apart when the pipe cools off at night. Heat application method for jointing shall
not be allowed.
c) Flanged Joints :
For jointing PVC pipes particularly of larger size to valves and vessels and larger
size metal pipes where the tensile strength is required the joint is made by the
compression of a gasket or ring seal in the face of CI flange. Flanges solvent
welded to the PVC pipes shall be supplied by the manufacturers.
d) Rubber Ring Joints :
Rubber ring joints can provide a watertight seal but do resist pull. As such these
may be used only as repairs collar and for jointing pipes larger than 110mm.
Such joints may be provided on pipes, which are buried in the ground and
supported throughout on bedding so that they are not subject to movement and
longitudinal pull. The material of rubber ring shall conform to IS : 5382-1985,
where aggressive soil are met with, synthetic rubbers perform better for jointing.
The ring shall be housed in a groove formed in plastic or metallic housing. The
ring shape and the method of compressing the ring vary considerably in different
type of joints. Most joints often require the application of lubricating paste,
which shall be procured from the manufacturer of PVC pipes.
242
CONTRACTOR NLUO
e) Mode of Measurements :
The length shall be measured in running metre correct to a cm for the finished
work which shall I nclude PVC fittings such as bends, tees, elbows, reducer,
crosses, plugs, sockets, nipples and nuts, but exclude, taps, valves, etc. All pipes
and fittings shall be classified according to their outside diameter. Reducer shall
be measured along with the larger diameter pipe. As far as jointing is concerned
even though explained in foregoing paras the jointing of pipes shall be carried out
as per the code of practice.
f) Testing : Prior to testing ,safety precautions should be instituted to protect personal
and property in case of test failure.Conduct pressure test with water ,do not use
air or other gases for pressure testing . The piping system should be adequately
anchored to limit movement.Water under pressure experts thrust forces in piping
systems. Thrust blocking should be provided at changes of direction,change in size
and at dead ends.Tables for initial set and cure times before pressure testing
should be preffered.The piping systems should be slowly filled with water, taking
care to prevent surge and air entrapment. The flow velocity should not exceed 1feet
per second.All trapped air must be slowly realeased.Vents must be provided at all
high points of the piping system.All valves and air relief mechanisms should be
opened so that the air can be vented while the system is extremely dangerous
and it must be slowly and completely vented prior to testing.The piping system can
be pressurized to 125% of its designed working pressure.However care must be
taken to ensure the pressure does not exceed the working pressure of the lowest
rated component in the System(valves,unions,flanges,treaded parts etc).The pressure
test should not exceed one hour.Any leaking joint or pipe must be cut out and
replaced and the line recharged and retested using the same procedure.
g) P.V.C pipe:P.V.C pipes shall conform to I.S 13592 Type A with solvent cement
joints . The main P.V.C pipes shall be of 110mmdia O.D.as specified
20.0. PIPING MATERIALS
20.1 PP-R Pipes
PP-R pipes and fittings shall be of good and tough quality. The pipes and fittings shall
be true to shape, smooth and cylindrical, their inner and outer surface being as nearly as
practicable concentric. They shall be sound and nicely cast, shall be free from cracks,
taps, pinholes and other manufacturing defects.
The pipes and fittings shall conform to IS as mentioned. Fittings shall be of required
degree with or without access door. The fittings shall be of the same manufacturer as the
pipes used for soil, waste & rain water.
All pipes and fittings shall bear the manufacturer's name and ISI specification to which it
conforms.
Production Sizes and Tolerances
(For PN 16 / SDR 7.4 Pipes)
mm
Outer Tolerance Wall Thickness
Appox. Unit Weight
Diameter Limit Thickness Tolerance
kg/m
d mm mm S mm mm
243
CONTRACTOR NLUO
DIN 8077 / December 1997
16 +0.3 2.2 +0.5 0.095
20 +0.3 2.8 +0.6 0.148
25 +0.3 3.5 +0.7 0.230
32 +0.3 4.4 +0.8 0.370
40 +0.4 5.5 +0.9 0.575
50 +0.5 6.9 +1.1 0.896
63 +0.6 8.6 +1.3 1.41
20.2Preparations :
Polyfusion welding machine (PED): Prior to switching the machine, heating elements
i.e. matrices for the required sizes of pipes/fitting should be fixed to the heating plate of
PFD using the Allen key.
After switching the power supply on, two LEDs light up, indicating the operating status
of the device and connections of power supply. When the heating LED lights off, it
indicates that the device is ready for joining i.e. heated upto appropriate temperature.
20.3Jointing Procedure :
1. Cutting
Cut the pipe square to the axis to required length allowing for planned overlap with
fittings. Pipes should be cleaned and free from any foreign material. Pipe should be cut
with the help of cutter.
2. Marking
Mark the required insertion depth on the pipe with the help of suitable marker. This
depth varies with the diameter of pipe and given below in the table (column 1).
3. Heating
Heat the PFD (260°C). Heat the pipe and fitting on the PFD as per recommended heating
times mentioned in the table (column 1).
4. Welding
After specific heating time mentioned in the table remove the pipe and fitting again
without rotating while pulling out of the matrices. Heated end of pipe should be pushed
in to the flared end of the hot fitting down to the previously marked depth. Welding time
depends on the size of the pipe. (Column 2)
244
CONTRACTOR NLUO
5. Cooling
After the cooling The joint gets a first stiffness, after this phase fitter/plumber can start to
make next joint
20.4 Installing of Pipes
 Fit the welding machine with the dies of required pipe and fittings diameter to be
processed and connect with plug to the 230 V power supply socket. Wait until
thermostat light on the machine goes off, indicating that welding machine has
reached the working temperature (2600 C).
 Cut the pipe at right angles to axis. In order to avoid the errors in defining the
distances and direction of the fittings, one may use a pencil for markings.
 Push the end of the pipe and simultaneously the fitting without turning them up to the
marked welding depth into tools. It is important to observe the heating times of
assembly parts.
 After stipulated heating time, quick remove pipe & fitting from the welding dies.
Join them immediately and without turning, until the marked welding depth of pipe
is covered by the PP-R fitting.
 After heating the joining parts don‟t push them vigorously. At the stage of joining, it
is possible to effect the rotation of maximum 100 to 150 in order to perform coaxial
correction.
20.5 Fixing Ferrules
For fixing ferrule, the empty main shall be drilled and tapped at 4-5° to the vertical and
the ferrule screwed in. The ferrule must be so fitted that no portion of the shank shall be
left projecting within the main into which it is fitted.
20.6 Cutting Chases in Masonry Walls
The chases up to 7.5 x 7.5 cm shall be made in the walls for housing GI pipes etc. These
shall be provided in correct positions as shown in the drawings or directed by the
Architects. Chases shall be made by chiselling out the masonry to proper line and depth.
After GI pipes etc are fixed in chases, the chases shall be filled with cement mortar 1:2:4
or as specified may be made flush with the masonry surface. The concrete surface shall
be roughened with wire brush to provide a key for plastering.
20.7 Water Fittings
Unless otherwise specified, all gunmetal fittings such as gate, globe, check & safety
valves shall be fitted in pipe line in a proper workman like manner. Necessary unions
shall be provided on both ends of the valves for easy replacement. The joints between
fittings and pipes shall be leak-proof when tested to a pressure of 2.5 times of working
pressure. The defective fittings and joints shall be replaced or redone.
245
CONTRACTOR NLUO
20.8 Making water connection
A pit of suitable dimension shall be dug at the point where the connection is to be made
with main line and earth removed up to 150 mm below the main. The flow of water in
main shall be disconnected by operating the nearest sluice valve on the main. The main
shall be drilled and slopped at 45° to the vertical and the ferrule of required size shall be
screwed in. The ferrule shall be fitted in a manner so that no portion of projection of the
shank shall be left projecting within the main into which it is fitted. Ferrule shall be non-
ferrous material with a C.I bell mouth cover and shall be of nominal bore as required.
20.9 Installation of Water Meter and Stop Cock
The G.I lines shall be cut to the required lengths at the position where the meter and stop
cock are required to be fixed. Then end of the pipe shall be threaded. The meter and stop
cock shall be fixed in a position by means of connecting pipes, GI jam nut and socket
etc. The stopcock shall be fixed near the inlet of the water meter. The paper disc inserter
in the ripples of the meter shall be removed. And the meter is installed exactly horizontal
or vertical in the flow line in the direction shown by the arrow on the body of the meter.
Care shall be taken that the factory seal of the meter is not disturbed. Wherever the meter
shall be fixed to a newly fitted pipe line, the pipe line shall have to be completely
washed before fitting the meter.
20.10 Connections to RCC Water Tanks
The contractor shall provide all inlets, outlets, washouts, vents, ball cocks, overflows
control valves and all such other piping connections including level indicator / controller
to water storage tanks as called for. All pipes crossing through RCC work shall have
puddle flanges fabricated with MS/GI pipes of required size and length and welded to
6mm thick MS plate. All puddle flanges must be fixed in true alignment and level to
ensure further connection in proper order.
Suitable float controls of an approved make, securely fixed to the tank, independent of
the inlet pipe and set in a position such that water inlet into the tank is cut off when filled
up to the water line. The water level in the tanks shall be of adjusted to 25mm below the
lip of the overflow pipe. Full way gate valves of an approved make shall be provided as
near the tank as practicable on every outlet pipe from the storage tank except the
overflow pipe. Overflow and vent pipes shall terminate with mosquito proof coupling.
The overflow pipe shall be so placed to allow the discharge of water being readily seen.
The overflow pipe shall be of size as indicated. A stop valve shall also be provided in the
inlet water connection to the tank. The outlet pipes shall be fixed approximately 75mm
above the bottom of the tank towards which the floor of the tank is sloping to enable the
tank to be emptied for cleaning.
20.11. Disinfection of piping system and Storage Tanks
Before commissioning the water supply system, the contractor shall arrange to disinfect
the entire system as described in the succeeding paragraph.
The water storage tanks and pipes shall first be filled with water and thoroughly flushed
out. The storage tanks shall be filled with water again and disinfecting chemical
containing chlorine shall be added gradually while tanks are being filled to ensure
246
CONTRACTOR NLUO
thorough mixing. Sufficient chemical shall be used to give water a dose of 50 parts of
chlorine to one million parts of water. If ordinary bleaching powder is used, the
proportions will be 150 gms of powder to 1000 liters of water. The powder shall be
mixed with water in the storage tank. If a proprietary brand of chemical is used, the
proportions shall be specified by the makers. When the storage tank is full, the supply
shall be stopped and all the taps on the distributing pipes are opened successively. Each
tap shall be closed when the water discharged begins to smell of chlorine. The storage
tank shall then be filled up with water from supply pipe and added with more
disinfecting chemical in the recommended proportions. The storage tank and pipe shall
then remain charged at least for three hours. Finally the tank and pipes shall be
thoroughly flushed out before any water is used for domestic purpose.
20.12 Shifting of Excavated Surplus Material
Contractor shall make his own arrangement to shift the surplus excavated material within
the site limits as directed by Engineer-in-charge.
20.13 Testing
a) All water supply system shall be tested to hydrostatic pressure test of at least two
and half time the maximum pressure but not less than 7.5 Kg/Sq Cm. for a period
of not less than 24 hours. All leaks and defects in joints revealed during the
testing shall be rectified and got approved at site.
b) Piping required subsequent to the above pressure test shall be retested in the same
manner.
c) System may be tested in sections and such sections shall be entirely retested on
completion.
d) The Contractor shall make sure that proper noiseless circulation of fluid is achieved
through the entire piping network of the system concerned. In case of improper
circulation, the contractor shall rectify the defective connections. He shall bear all
expenses for carrying out the above rectifications including the tearing up and
refinishing of floors and walls as required.
21.0 INTERNAL WATER SUPPLY SYSTEM:
Supplying, laying, jointing, testing &commissioning approved make 3 Layer PP-R pipes
and fittings confirming to IS 1239 PI & II, malleable fittings viz., tees, elbows, flanges,
unions etc.,including cutting threading, fixing in/on walls, below ceilings, under floor
etc., as per drawings. The quoted rate shall include necessary earthwork, chasing in
walls, making bores in walls, foundations and slabs and making good the chased surfaces
and bores in CM 1:4.
20 mm dia
25 mm dia
32 mm dia
40 mm dia
50 mm dia
63 mm dia
247
CONTRACTOR NLUO
Supplying, installing and testing approved make GM/Brass ball valves conforming to
IS 1703 with unions etc., complete .
50 mm dia (Screwed ends)
Providing and fixings GM/Brass gate valve of approved quality (screwed end)
25 mm nominal bore
40 mm nominal bore
50 mm nominal bore
63 mm nominal bore
Providing and fixings Union of approved quality (screwed end)
25 mm nominal bore
40 mm nominal bore
50 mm nominal bore
63 mm nominal bore
22.0 RAIN WATER SPOUT AND PIPES
Providing and fixing on wall face unplasticised PVC (working pressure 4 Kg. per sqcm)
rain water pipes confirming to IS : 4985 including jointing with seal ring conforming to
IS : 5382 leaving 10 mm gap for thermal expansion.
Single socketed pipes
110 mm diameter
Providing and fixing on wall face unplasticised - PVC moulded fittings / accessories
forunplasticised - Rigid PVC rain water pipes conforming to IS : 13592 Type A
including jointing with seal ring conforming to IS : 5382 leaving 10 mm gap for thermal
expansion
110 mm bend with door
110 mm plain bend
110 mm shoe
Providing and fixing unplasticised-PVC brackets of approved design to unplasticised-
PVC rain water
By means of nuts and bolts hard wood plugs, screwed with M.S. screws of required
length including cutting
brickwork and fixing in cement mortar 1:4 (1 cement : 4 coarse sand) and making good
the wall etc. complete.
110 mm diameter
248
CONTRACTOR NLUO
23.0 Galvanized Iron pipes
a) Fittings : The pipes shall be of galvanized (As per I.S. 4736 of latest edition)
steel, screwed and socketed and shall conform to I.S. 1239 ( Part-I) of latest
edition. The fittings shall be of malleable cast iron (Galvanized ) with ISI mark
up to 100mm nominal bore. For pipes above 100 mm N.B., welded steel fittings
(Galvanized) may be used. Unless otherwise specified thread shall be screws
taper thread and sockets parallel thread and each tube shall be laid beveled
sufficiently to prevent damage to the leading thread.
________________________________________________________________________
Nominal Bore. weight of Pipe in Kg/mtr
Light Medium Heavy
------------------------------------------------------------------------------------------------------------
15mm 0.96 1.23 1.46
20mm 1.42 1.59 1.91
25mm 2.03 2.46 2.99
32mm 2.61 3.17 3.87
40mm 3.29 3.65 4.47
50mm 4.18 5.17 6.24
------------------------------------------------------------------------------------------------------------
b) Laying & Fixing : Where pipes have to be cut or rethreaded. ends shall be
carefully filled out so that no obstruction to bore is offered.
In jointing the pipes, the inside of the socket and the screws end of the pipes
shall be rubbed over with white lead and few turns of hemp yarn wrapped
round the screwed end of the pipe which shall then be screwed home to the
socket with a pipe wench. Care must be taken that all pipes and fittings are
kept at all times free from dust and dirt during fixing . Any threads exposed
after jointing shall be pined.
c) All cutting holes, chases , trenches etc, at any place necessary in connection
with the work as per items of this tender any subsequent mending damages
are to be included in the rates and not paid extra unless other -wise
specified.
Internal work : Internal G.I. pipes and fittings inside the duct walls shall be
generally fixed on walls by means of standard pattern holder bat clamps
keeping the pipe 20mm clear of the wall every where or concealed where
required a s directed. If G.I. pipes and fittings of inside wall are to be
concealed , if shall be by chasing floors and walls as directed. where it is
imperative to fix the pipe inside toilers , kitchen, pantries, in front of a house
or any conspicuous position, where it looks unsightly, chasing to be adopted.
The holder bat clamps shall be fixed at a distance not exceeding 3.00 meter
apart for vertical pipes & 1.50 meters for horizontal pipe s which are to be
secured to walls by hooks. The valves shall be fitted with a union. In long
length run of a pipe at least in every 3.00 meters apart there shall be a long
screw/union.
All pipes and fittings shall be fixed truly vertical and horizontal or as directed
by the Architects,/Owner.
d) External work : For external work G.I. pipes and fittings shall be laid in
trenches. The width of the trench shall be of minimum width required for the
work. The pipe s laid underground shall not be less than 60cm from the
ground level. They shall be surrounded on all sides by sand of approved
quality. The work of excavation and refilling shall be done in accordance with
the general specification for earth work.
249
CONTRACTOR NLUO
e) Painting : All internal G.I. pipes and fittings shall be painted with 2 coats of
oil paint of approved quality manufacture, colour and shade. The cost of such
paintings shall be included in the contractor's rate. All pipes and fittings in
external work shall be painted with 3 coats of anti-corrosive Bitumastic paint.
Unless otherwise specified all concealed pipes and fittings shall be painted
with 3 coats of Bitumastic anticorrosive paint.
f) Testing : After installation (But before covering up where needed) all G.I.
pipes, and fittings shall be tested by Hydraulic pressure machine to a pressure
of 7 kg. per sq. cm. All lead joints must be mad e leak proof by tightening or
re-doing at contractor's expense and the pipe line must be retested to the
above pressure.
24.0 Brass or C.P. on Brass water Fittings ( As specified in respective schedule of
items):
All fittings shall be of standard Manufacture and shall in all respect comply with
the Indian standard specifications. The brass fittings shall be fixed in pipe line in
workman like manner . Care must be taken to see that joints between fittings are
made leak proof . The fittings and joints shall be tested to a pressure of 7 kg. per
80cm unless otherwise specified. The defective fittings and the joints shall be
repaired, redone or replaced at the contractor's expenses.
24.1 Bib cock : The bib cock shall be of horizontal inlet & free outlet of specified quality
of screw down a pattern of the size as specified. The closing device shall work by
means of disc carrying a renewable non-metallic washer which shuts against water
pressure on a seating at right angles to the axis of threaded spindle which operates
it. The handle (Head ) shall be of approved design & shape. The cock shall open in
anti-clockwise direction. The cock shall be polished bright (For brass ) and chrome
plated on brass (For C.P.) . Minimum weight shall be 0.40 kg. for 15mm size bib
cock.
24.2 Stop Cock : The stop cock shall be plain or angular type as per it's place of
installation & of specified quality opening anti clockwise & of screw down pattern
of the size as specified. Other specifications shall be as per the specification of Bib
cock above .
.
25.0 Manholes, Gully Chambers etc. :
a) Size of Manhole : The size specified shall be the internal size of the
manhole. The work shall be done strictly as per drawing and specification.
The following specifications shall be adopted.
b) Excavation : The manhole shall be excavated true to dimensions and levels
shown on he plan or as directed by the Architect/Owner.
c) Brick work : The brick work shall be with bricks having crushing strength
75/sq. cm brick in cement mortar 1:4 . It shall be 250 mm thick or as
instructed by the architect/ NLUO.
d) All angles shall be rounded 7.5 cm radius and all rendered internal
surfaces should be hard impervious finish obtained by using a steel trowel.
The external troe joints of the masonry shall be finished smooth.
e.) In wt ground 20mm thick cement plaster of the above specifications shall be
done on he outside surface of the walls also. this plaster shall be water
proofed with addition of 1 kg. of acco proof to 50 kg (1 bag) of cement or
with addition to any other equal and approved waterproofing compound. The
plastering shall be done up to 30cm above the set soil lines.
f) Channel and Benching : Channels shall be semi-circular in the bottom half
and of diameter equal to the sewer. Above the horizontal diameter, the sides
shall be extended vertically to the same level as the crown of the outgoing
250
CONTRACTOR NLUO
pipe and the top edge shall be suitable rounded off. The branch channels
shall also be similarly constructed with respect to the benching but at their
junction with the main channel on appropriate single suitably rounded off in
the direction of flow in the main channel.
The channel and benching shall be done in cement concrete (1:2:4) rising at a
slope of 1 in 6 from the edges of channel. The channels at the bottom of the
chamber shall be plastered with cement mortar 1:4 ( 1 cement :4 coarse sand)
and steel trowelled smooth.
g) R.C.C. Work : R.C.C. work for slabs etc. shall be in cement concrete 1:2:4 with
steel reinforcement as per detail drawings.
h) Plain Concrete : If used for fixing manhole covers, shall be of the above
specifications.
i) Foot Rests : These shall be of M.S. square rods 22 mm or as specified and
shall be galvanized or painted with coal tap these shall be embedded in
cement concrete (1:2:4) at least (9) 23 cm. while the brick work is in
progress. These shall be fixed 30 cm, apart vertically and staggered laterally
and shall not reject more than 11 cm from the wall.
j) Manhole covers and frames : All covers shall be of heavy type. these shall be
non -locking or locking type as specified and capable of easy opening and
closing . These shall ordinarily be gas and water tight, These shall be soluble
water seal type manhole cover and frame. the covers as specified in schedule
of Quantities, SFRC Surface box for air valves, sluice valves, peet valves etc.
shall be of sufficient dimensions to suit the sizes of these fittings and shall be
of heavy pattern when fitted in level to heavy traffic and shall be of standard
design or as directed by the Architect/NLUO.
k) The frame of manhole cover shall be embedded firmly in the R.C.C. slab or
plain concrete as the case may be on the top of the masonry.
l) When the manhole is built on the foot path , this shall be provided with 45cm
internal diameter or as specified heavy type SFRC. cover, of 56cm internal dia
or as specified. When it is built the metalled width of the road under traffic, it
shall be provided with approx 22" (560mm) internal diameter heavy type SFRC.
cover.
m) Painting : All C. I. / M.S. fittings like Manhole covers & frames, gratings,
footrests etc, shall be painted with two or more coats of Bitumastic paint & it's
rate shall be included in the rate of the Manholes, Gully chambers etc.
26.0 Types of Manholes
26.1 Manhole up to 0.75 Meter Depth : This shall be 0.9M x 0.8 M size ( Internal
dimension) unless otherwise shown in drawings instructed per site conditions.
a) Thickens s of brick wall-250mm
b) Cement brick work - (1:4)
c) Plaster : Plaster on inside surface of walls, bottom & part of outside surface of
walls and on RCC cover slabs shall be done as per drawings and directions.
d) Bed concrete (1:4:8)-150 mm thick with stone chips.
e) Brick flat soling - 75mm thick.
26.2 Depth of Manhole above 0.75 M up to 1.5 M : This shall be of 1.2 M x 1.2 M ( internal
) size unless otherwise shown in drawings or instructed as per site conditions.
Details same as that in item No 28.1 above.
26.3 Depth of Manhole above 1.5 M : This shall be of 1.2 M x 1.2 M (Internal) size or as
specified.
a) Thickness of brick wall
251
CONTRACTOR NLUO
i) 250 mm up to 1.5 M from finished G.L.
ii) 375 mm below 1.5 M from finished G.L.
Cement brick work plastering and Brick Flat Soling same as in Item 27.1 above.
27.0 SFRC Manhole Cover and Frame
S.F.R.C. (Steel Fibre Reinforced Concrete) frames and covers of the specified size and
duty shall be embedded in reinforced cement concrete slab 1:2:4 (1 cement: 2 coarse sand: 4
graded stone aggregate 20mm nominal size) 15cm thick. Reinforcement shall consist of
12mm dia. M.S. bars of 15cm centre to centre.
Duty of Manholes covers & frame :
All manhole cover & frame shall be S.F.R. concrete conforming to IS specification.
Manholes covers shall be as follows unless otherwise specified:
a) In the shaft or green area - Light duty
b) In pavement where only pedestrian traffic is allowed - Light duty/Medium duty
c) In road - Heavy duty
28.0 The SFRC Manhole Cover and Frame shall conform to IS:1726 and the grade and types
have been specified . The cover and frames shall be cleanly cast and they shall be free
from air and sand holes and from cold shuts. They shall be neatly dressed and carefully
trimmed. All castings shall be free from voids whether due to shrinkage, gas inclusion or
other causes. Covers shall have a raised checkered design on the top surface to provide
an adequate non-slip grip.
The sizes of covers specified shall be taken as the clear internal dimensions of the frame.
The covers and frames shall be coated with a black bituminous composition. The coating
shall be smooth and tenacious. It shall not flow when exposed to a temperature of 63° C
and shall not brittle as to chip off at a temperature of 0° C.
Thickness of bed concrete (1:4:8)- 225 mm with stone chips.
29.0 Prior approval of Sample Materials /Works : Samples and all materials & works shall
be approved by the Architects/NLUO before the contractor undertakes any major
procurement of materials or proceeds with the works concerned. The quantum of
materials/works for approval of samples shall be decided by the Architect/NLUO &
no extra payment shall be made to the contractor for sample materials procurement/or
works & replacement of materials altering or redoing of works as required and
instructed by the Architects/NLUO.
The typical approved sample material for each work shall be kept in the office of the
NLUO/Architects at site until the satisfactory completion of the works. The materials
supplied and installed at site shall be of the same quality & size as of the approved
samples, otherwise they shall be rejected.
The decision of the Owner/Architects or their authorized representatives of whether
a materials compares well with he approved sample shall be final and binding on
contractor. The same principal shall be applicable to sample work approved & further
works done at site.
30.0 Cleaning & disinfections of the supply system, water storage tanks and down take
distribution pipes : All water mains , communication pipes, service and distribution
pipes used for water for domestic purpose should be thoroughly and efficiently
disinfected before being taken into use and allows after every major repair. The
method and disinfections shall be subject to the approval or the Owner/Architects.
252
CONTRACTOR NLUO
The water storage tanks (underground and Overhead) & pipes shall first be filled
with water & thoroughly flushed out. The storage tanks shall ten be filled with water
again and disinfecting chemical containing chlorine added gradually while the tanks
are being filled, to ensure thorough mixing, sufficient chemical shall be used to five
water a dose of 50 parts of chlorine to one million parts of water. If power to 1000
Liter of water . The power shall be mixed with water to a creamy consistency before
being added to the water in the storage tank. If proprietary brand of chemical is
used, the proportions shall be as specified by the markers, When the storage tank is
full, the supply shall be topped and all the taps on the distribution pipes opened
successively , working progressively away from the storage tank. Each tap shall be
closed when the water discharge begins to smell of chlorine. The storage tank shall
then be topped up with water from the supply pipe and with more disinfecting
chemical in the recommended proportions. The storage tank & pipes shall then remain
charged at least for three hours. Finally , the tank and pipes shall be thoroughly
flushed out before any water is used for domestic purpose.
31.0 Cleaning & disinfections of the supply system, water storage tanks and down take
distribution pipes : All water mains , communication pipes, service and distribution
pipes used for water for domestic purpose should be thoroughly and efficiently
disinfected before being taken into use and allows after every major repair. The
method and disinfections shall be subject to the approval or the Owner/Consultants.
32.0 The water storage tanks (underground and Overhead) & pipes shall first be filled
with water & thoroughly flushed out. The storage tanks shall ten be filled with water
again and disinfecting chemical containing chlorine added gradually while the tanks
are being filled, to ensure thorough mixing, sufficient chemical shall be used to five
water a dose of 50 parts of chlorine to one million parts of water. If power to 1000
Liter of water . The power shall be mixed with water to a creamy consistency before
being added to the water in the storage tank. If proprietary brand of chemical is
used, the proportions shall be as specified by the markers, When the storage tank is
full, the supply shall be topped and all the taps on the distribution pipes opened
successively , working progressively away from the storage tank. Each tap shall be
closed when the water discharge begins to smell of chlorine. The storage tank shall
then be topped up with water from the supply pipe and with more disinfecting
chemical in the recommended proportions. The storage tank & pipes shall then remain
charged at least for three hours. Finally, the tank and pipes shall be thoroughly flushed
out before any water is used for domestic purpose.
253
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR EXTERNAL DRAINAGE & SEWAGE
DISPOSAL
1. GENERAL SCHEME
The contractor shall install a drainage system to effectively collect, drain and dispose all
soil and waste water from various parts of the buildings, appurtenances and equipment.
The piping system shall finally terminate and discharge into the Sewerage Treatment
Plant and then into the City sewer manhole. The piping work mainly consists of laying
of UPVC pipes, as called for on the drawings. All piping shall be installed at depth
greater than 60 cm below finished ground level. The disposal system shall include
construction of gully traps, manholes, intercepting chambers as indicated. The piping
system shall be vented suitably at the starting point of all branch drains, main drains, the
highest/lowest point of drain and at intervals as shown. All ventilating arrangements
shall be un obstructive and concealed. The work shall be executed strictly in accordance
with IS:1742. The sewage system shall be subject to smoke test for its soundness as
directed by the Project Director. Wherever the sewerage pipes run above water supply
lines, same shall be completely encased in cement concrete 1:2:4 all round with the prior
approval of the Project Director.
2. LAYING AND JOINTING OF PIPES
2.1 General
All the material shall be new of best quality conforming to specifications and subject to
the approval of the Architects. Drainage lines shall be laid to the required gradients and
profiles. All drainage work shall be done in accordance with the local municipal by-laws.
Contractor shall obtain necessary approval and permission for the drainage system from
the municipal or any other competent authority. Location of all manholes, catch basins
etc. shall be confirmed by the Project Director before the actual execution of work at
site. All work shall be executed as directed by the Project Director.
2.2 Alignment and Grade
The sewer and storm water drainage pipe/drains shall be carefully laid to levels and
gradients shown in the plans and sections but subject to modifications as shall be
ordered by the Project Director from time to time to meet the requirements of the works.
Great care shall be taken to prevent sand etc. from entering the pipes. The pipes between
two manholes shall be laid truly in straight lines without vertical or horizontal
undulations. The body of the pipes shall rest on an even bed in the trench for its length
and places shall be excavated to receive collar for the purpose of jointing. No deviations
from the lines, depths of cuttings or gradients as called for on the drawings shall be
permitted without the written approval of the Project Director. All pipes shall be laid at
least 60cms below the finished ground level or as called for on the drawings.
2.3 Setting out Trenches
The contractor shall set out all trenches, manholes, chambers and such other works to
true grades and alignments as called for. He shall provide the necessary instruments for
254
CONTRACTOR NLUO
setting out and verification for the same. All trenches shall be laid to true grade and in
straight lines and as shown on the drawings. The trenches shall be laid to proper levels
by the assistance of boning rods and sight rails which shall be fixed at intervals not
exceeding 10 meters or as directed by the Architect.
2.4 Trench Excavation
The trenches for the pipes shall be excavated with bottoms formed to level and gradients
as shown on the drawings or as directed by the Project Director. In soft and filled in
ground, the Project Director may require the trenches to be excavated to a greater depth
then the shown on the drawings and to fill up such additional excavation with concrete
(1:4:8) consolidated to bring the excavation to the required levels as shown on the
drawings.
All excavations shall be properly protected where necessary by suitable timbering, piling
and sheeting as approved by the Project Director. All timbering and sheeting when
withdrawn shall be done gradually to avoid falls. All cavities shall be adequately filled
and consolidated. No blasting shall be allowed without prior approval in writing from
the Project Director. It shall be carried out under thorough and competent supervision,
with the written permission of the appropriate authorities taking full precautions
connected with the blasting operations. All excavated earth shall be kept clear of the
trenches to a distance equal to 75 cms.
2.5 Obstruction of Roads
The contractor shall not occupy or obstruct by his operation more than one half of the
width of any road or street and sufficient space shall then be left for public and private
transit. He shall remove the materials excavated and bring them back again when the
trench is required to be refilled. The contractor shall obtain the consent of the Project
Director in writing before closing any road to vehicular traffic and the foot walks must
be clear at all times.
2.6 Protection of Pipes etc.
All pipes, water mains, cables etc. met in the course of excavation shall be carefully
protected and supported. Care shall be taken not to disturb the cables, the removal of
which shall be arranged by the contractor with the written consent from the Owner.
2.7 Trench Back Filling
Refilling of the trenches shall not be commenced until the length of pipes therein has
been tested and approved. All timbering which may be withdrawn safely shall be
removed as filling proceeds. Where the pipes are unprotected by concreted haunching,
selected fine material shall be carefully hand-packed around the lower half of the pipes
so as to buttress them to the sides of the trench.
The refilling shall then be continued to 150mm over the top of the pipe using selected
fine hand packed material, watered and rammed on both sides of the pipes with a
wooden hammer. The process of filling and tamping shall proceed evenly in layers not
exceeding 150mm thickness, each layer being watered and consolidated so as to
maintain an equal pressure on both sides of the pipe line. In gardens and fields the top
solid and turf if any, shall be carefully replaced.
255
CONTRACTOR NLUO
2.8 Contractor to ensure Settlement and Damages
The contractor shall at his own costs and expenses, make good promptly during the
whole period for the works in hand if any settlement occurs in the surfaces of roads,
beams, footpaths, gardens, open spaces etc. in the public or private areas caused by his
trenches or by his other excavations and he shall be liable for any accident caused
thereby. He shall also, at his own expense and charges, repair (and make good) any
damage done to building and other property. If in the opinion of the Project Director he
fails to make good such works with all practicable despatch, the Project Director shall be
at his liberty to get the work done by other means and the expenses thereof shall be paid
by the contractor or deducted from any money that may be or become due to him or
recovered from him by any other manner according to the laws of land.
The contractor shall at his own costs and charges provide places for disposal of all
surplus materials not required to be used on the works. As each trench is refilled, surplus
soil shall be immediately removed, the surface shall be properly restored and roadways
and sides shall be left clear.
2.9 Removal of water from Sewer, trench etc
The contractor shall at all times during the progress of work keep the excavations free
from water which shall be disposed by him in a manner as will neither cause injury to the
public health nor to the public or private property nor to the work completed or in
progress nor to the surface of any road or streets, nor cause any interference with the use
of the same by the public.
If any excavation is carried out at any point or points to a greater width of the specified
cross section of the sewer with its cover, the full width of the trench shall be filled with
concrete by the contractor at his own expense and charges to the requirements of the
Project Director.
2.10 Route Markers
Markers indicating the particular service shall be provided along with the routes of pipe
trenches. Markers shall be of mild steel indicating the type of service installed and the
direction of flow painted on it. The markers shall be set firmly in a concrete base and
installed at all corner and turning points. Over straight runs, markers shall be spaced
centre to centre at 50 meter centre (generally).
2.11 Laying and jointing of UPVC PIPES
Soil, waste & vent pipes in shafts under the floors shall consist of UPVC pipes as
described earlier. Waste pipes from bottle trap to floor/urinal traps for wash basin, urinal
and sink shall also be of UPVC pipes and fittings.
All Horizontal pipes running below the slab and along the ceiling, shall be fixed on
structural adjustable clamps, strudy hangers of the design as called for in the drawings.
The pipes shall be laid in uniform slope and proper levels. All vertical pipes shall be
truly vertical fixed by means of stout clamps in two sections, bolted together, built into
the walls, wedged and neatly jointed. The branch pipes shall be connected to the stack at
the same angle as that of fittings. All connections between soil, waste and ventilating
pipes and branch pipes shall be made by using pipe fittings with inspection doors for
256
CONTRACTOR NLUO
cleaning. Pipes shall be fixed in a manner as to provide easy accessibility for repair and
maintenance and shall not cause obstruction in shafts. Where the horizontal run off the
pipe is long or where the pipes cross over building expansion joints etc. suitable
allowance shall be provided for any movements in the pipes by means of expansion joint
etc. such that any such movement does not damage the installation in any way.
Before jointing, the interior of the socket and exterior of the spigots shall be thoroughly
cleaned and dried. The spigot end shall be inserted into the socket right up to the back of
the socket and carefully. The jointed pipe line shall be at required levels and alignment.
No pipe/ joint shall be covered till the pipe line has been tested & approved (written) by
the owner‟s site Engineer.
Before the appliances are connected all opening of pipes shall be inspected and tested.
All opening of pipes shall be sealed with plugs and water test in small sections of pipes
shall be carried out.
After installation of all the appliances, discharge test shall be conducted individually
and collectively. Obstruction in any of the pipe lines shall be traced and whole system is
examined for hydraulic performance, including the retention of any adequate water seal
in each trap. Any defect revealed by the tests shall be made good and the tests are
repeated until a satisfactory result is obtained.
2.0 GULLY PIT :
To be the standard size 1.06 m x 0.63 m and to be built in cement mortar 1:3 or 3:1 as
specified in strict accordance with drawings. The internal sides and floor are to be
finished with 12mm cement plaster to be fitted with a 150 mm P.V.C. overflow pipe
with hinged cover and handle 0.90x 45 C.I. Gully grid of the standard weight 15 cm
syphone. The gully grid and frame are to be of 166 kg.
2.1 S.W. Gully Trap
Gully trap shall be stoneware conforming to IS:651. These shall be sound and free from
visible defects such as fire cracks, or hair cracks. The glaze of the traps shall be free
from cracks. They shall give a sharp clear note when struck with light hammer. There
shall be no broken blisters. Each gully trap shall have one CI grating of square size
corresponding to the dimensions of inlet of gully trap. It will also have a water tight C.I
cover with frame inside dimensions 300 x 300mm the cover weighing not less than 4.5
kg and the frame not less than 2.7kg. The grating cover and frame shall be of good
casting and shall have truly square machined seating faces.
Fixing of S.W. Gully Trap
The excavation for gully traps shall be done true to dimensions and levels as indicated on
plans or as directed by the Project Director /Consultant / Architect. The gully traps shall be
fixed on cement concrete foundation 65cm square and not less than 10cm thick. The mix
for the concrete will be 1:4:8. The jointing of gully outlet to the branch drain shall be done
similar to the jointing of S.W. Pipes described earlier. After fixing and testing gully and
branch drain, a brick work of specified class in cement mortar 1:5 shall be built with a half
brick masonry work round the gully trap from the top of the bed concrete upto ground
level. The space between the chamber and trap shall be filled in with cement concrete 1:3:6.
The upper portion of the chamber i.e. above the top level of the trap shall be plastered
257
CONTRACTOR NLUO
inside the cement mortar 1:3 finish with a floating coat of neat cement. The corners and
bottom of the chamber shall be rounded off so as to slope towards the grating.
SFRC cover with frame 300 x 300 mm (inside) shall then be fixed on the top of the
brick masonry with cement concrete 1:2:4 and rendered smooth. The finished top cover
shall be so as to prevent the surface water from entering the gully trap.
258
CONTRACTOR NLUO
MODE OF MEASUREMENT
The method of measurement for various item in the tender shall be generally in
accordance with the latest ISI : 1200 code , if not stated otherwise in this tender
documents.
1.0 EXCAVATION :
a Footings. : Area of excavation for footing shall be measured equally to the area of
the lowest concrete course as shown on the drawing -Depth shall be measured
vertically from ground level to bottom of concrete course or dry rubble packing or
brick flat soling as the case may be.
b. Plinth Beams : Depth of excavation for plinth beam shall be measured from ground
level up to bottom of beam and width equal to width of beam. If a leveling course
is ordered. It shall be measured up to the bottom of the leveling course.
c. Where the excavations is made in trenches, measurements for cutting shall be taken
by means of taps and staff and after completion of work and total quantity of
excavation computed from these levels in manner approved by the architect/NLUO.
d. Where excavation is made for leveling the site ,levels shall be taken before start and after
completion of work and work and total quantity of excavation computed from these levels
in manner approved by the Architect.
e. Where soil including soft rock are mixed hard rock after excavation shall be stacked
separately. Measurement of the entire excavation shall be taken as indicated above.
Excavation of hard rock shall be measured from stacks of excavated hard rock and
reduced by 40% for bulkage and voids. The quantity so arrived at shall be paid for under
hard rock. The quantity so arrived at shall be paid as soil including and quantity payable
under hard rock shall be paid as soil including soft rock.
f. Any additional excavation required for working space from work showing, planning,
dewatering etc, shall not be measured for separately. Rates quoted for excavation shall
include all these factors and filling back the trenches with available soil.
2.0 EARTH FILLING
To open spaces : Filling shall be measured from cross sections of embankment, levels of
which are recorded by means of levels before start of work and after completion of work.
When it is not possible to measure filling from cross sections, it may be measured from
loose stack of lorry measurements with previous written permission from the N.L.U.O's
Engineer and 20% deduction shall be made from the measured quantity to arrived at the
net quantity payable.
3.0 CEMENT CONCRETE (PLAIN AND REINFORCED)
Cement concrete in P.C.C. items shall be measured excluding reinforcement and plaster
thickness but including hire charges of centering and shuttering all equipments, curing,
stacking and fair finishing. Reinforcement and plate shall be measured and paid separately
.
Items like R.C.C precast jalli ,R.C.C. pipes and other such items which are normally
manufactured in factories as well as those items which have been specifically mentioned
in schedule of quantities shall be measured inclusive of reinforcement.
No deduction will be made for opening up to 0.1sq. and no extra labour for forming such
opening or voids shall be paid,
Columns shall be measured from the top of the footing & shall be measured through.
Including flare of the column in case of flat slab construction.
259
CONTRACTOR NLUO
Beams shall be measured from face to face of columns/beams and shall include haunches
if any. The depth of the beam (other than draft foundation beams) shall be measured from
top of the slab to bottom of the beam.
In case of combined footings and raft foundation. The exposed portion of beam rib shall
be measured as beam and the remaining portion measured in footings/raft slab.
Slab (Other than an raft foundation) shall be measured in bays (Clear of beam ) either
deduction for column portion.
Staircase : Measurements shall be in cum staircase comprising of step soffit slab .Landing
slab shall be measured and paid under this item, side parapet walls., Railings finishing of
risers & trades M.S. reinforcement and plastering etc. shall be paid separately under
respective terms.
4.0 REINFORCEMENT :
Shall be measured in lengths of bars as actually placed subject to more of required as per
structural drawings in position weight calculated actual or as per standard tables which
ever is less with 3 places of decimals. No allowance being made in the weight for rolling
margin. Wastage and binding wire shall not be measured. Authorized overlaps and spacers
shall only be measured.
5.0 BRICK WORK
Except walls of half brick thickness or less. All brick work and be measured in cubic
meters stating thickness.
THCIKNESS OF WALL :
Brick walls up to & including three (3) bricks in thickness shall be measured in multiples
of half brick which shall deemed to be inclusive of the mortar joints.Where fractions of
half brick occur to architectural or other reasons. The measurement shall be taken as full
given brick.
For walling which is more than three bricks in thickness the actual thickness of wall shall
be measured to the nearest centimeter.
DEDUCTION
No deduction or additions shall be made on any account for :-
i. Ends of dissimilar materials ( i.e., joists, beams, lintels, lofts, girders, rafter, purlin,
trusses, corbels, steps etc) up to 500 square centimeters in section.
ii. Opening up to 0.1 sqm in section.
iii. Walls plates lead plates and bearing of slabs, chajja & the like when the thickness
does not exceed 10.00 cm. and the bearing does not extend over the full width of
the wall.
260
CONTRACTOR NLUO
6.0 WOOD WORK :
All wood work shall be measured net as fixed. No extra measurement will be
given for shape , joints, splayed, meeting styles of doors and windows and shall be
measured unit of square meter.
Area over one face inclusive of exposed frame thickness excluding width of cover
mould shall be measure in case of doors, windows and ventilators when frames
are included in the item. Portions embedded, in masonry or in flooring shall not be
measured. Where frames are measured separately. It shall be measured for finished
dimension. No allowance shall be made for wastage and for dimension supplied
beyond those specified. Length of piece shall be measured overall nearest to cm.
so as to include protections for tennons. Scarves or mitres, width and thickness
shall be measured to the nearest mm. cubical contents shall be worked out in units
of 10 cubic decimeter in whole numbers.
In case of moldings, rounding, rebates, circular and varying sections. The sectional
area of the pieces shall be taken as the area of the least square or rectangle from
which such a section can out.
7.0 STEEL/ ALUMIUM DOORS WINDOWS VENTILATORS LOUVERS :
Clear area over one face inclusive of exposed frame shall be measured. Anchor
fastner or portions embedded in masonry or flooring shall not be measured. All
composite units shall be measured as fixed. Extra for side hung, top hung & center
hung portions shall be measured from outside or the casement frames.
8.0 STEEL ROLLING SHUTTERS :
Clear width between side jams and clear height between floor and bottom of
lintel / beam shall be measured . Hood shall not be measured separately. The rate
should be inclusive of the cost hood.
9.0 COLLAPSIBLE GATE :
The height of the gate shall be measured as the length of the double channels and
breadth from outside to out side of the end fixed double channels in open portion
of the gate.
10.0 FLOORING , SKIRTING , DADO :
Flooring shall be measured from skirting to skirting and where the wall surfaces
are plastered or provided with dado it shall be measured from plaster to plaster
or from dado to dado respectively.
11.0 PLASTERING AND POINTING. :
All plastering and pointing work shall be measured in square meters unless
otherwise described, deductions will be made in accordance of IS- 1200.
12.0 PAINTING, WHITE WASHING COLOUR WASHING AND DISTEMPERING :
All painting work shall be measured in square meters.
Net area of the surface painted shall be measured. Deductions shall be made in
accordance of IS-1200.
261
CONTRACTOR NLUO
EXTERNAL DEVELOPMENT WORKS
TECHNICAL SPECIFICATION FOR EXTERNAL WATER SUPPLY AND
DRAINAGE.
Excavation in all types of soil for laying water supply pipes upto 100mm dia. including forming
bottom surface to required level, refilling selected excavated earth around the pipe in layers 150mm
thick, watering, consolidating and disposing off the surplus earth within the site as directed by the
engineer with a lead of aproximately 500M complete.
Supplying, fixing and testing inlet, outlet, vent and overflow pipes, fittings with SFRC frame and
cover to overhead water tank and under ground water tank complete with step irons as shown on
the drawings etc., complete, accessories comprising of the following :
Construction of valve chamber with 230mm best quality TM bricks in CM 1:4 over a bed of 100
mm thick P.C.C.(1:4:8), internal walls plastered smooth in CM 1:3 and external walls plasered
rough with sponge finish including curing with all necessary leads and lift and providing heavy
duty cast iron cover with frame with locking arrangement ect. complete including Heavy duty cast
iron cover of size 600*600 (weight 11Kgs.) For valves up to 80 mm dia Size 0.6mx0.6mx1M (clear
dimension)
Providing and fixing polyvinyl chloride (PVC) pipes, supplying including all PVC plain &brass
threaded fittings , this included jointing of pipes & and fitting with one step solvent cement ,
trenching , refilling & testing of joints complete as per direction of the Engineer-in-charge
i) 50mm nominal dia pipes
ii) 100 mm nominal dia pipes
iii) 150 mm nominal dia pipes
iv) 200 mm nominal dia pipes.
Supplying, installing, testing and commissioning CI butterfly (isolation) valves with standard
lever confirming to IS standard 13039 with necessary flanges, nuts and bolts etc., complete.
a) 40 mm dia
b) 50 mm dia
c) 65 mm dia
d) 80 mm dia
Supplying and fixing in position approved make GM non-return valve conforming to IS 778 with
unions etc.,complete.
a) 40 mm dia
b) 50 mm dia
c) 65 mm dia
d) 80 mm dia
Supplying, installing, testing and commissioning approved make water level controllers for the
overhead, underground sump, storm water sump, and pump room sump tanks detailed as sensors,
control and display panel in the basement and making all connections.,wiring in conduits as per
equipment manufacturers specification (approximately 600m)
Supplying, installing, testing and commissioning approved make copper float ball valve with
unions etc., complete.
a) 65 mm dia.
b) 50 mm dia.
262
CONTRACTOR NLUO
Supplying, installing and commissioning approved make CI flanged brass `Y' strainer with
necessary nuts and bolts, neoprene rubber gaskets, flanges, etc.., complete.
a) 80mm dia.
b) 50mm dia.
Providing, fixing, jointing and testing in position flowguard PVC with sch 80 pipes & fittings,
UV stabilized, confirming to ASTM D 1785 & ASTM D 2467 suitable for cold water supply
in exposed works complete with all necessary fittings i.e. elbows, tees, bends, couplers,
reducers, unions, plugs, clamps including jointing the pipe and fitings by solvent cement over
primer coat as per ASTM D 2564 including proper support and clamped complete as required
included threaded fittings with or without brass inserts including building expansion loop
wherever pipe crosses exp joint, as required by the Engg-in-charge for proper completion of the
work.
25 mm Nominal Size / 33.40 mm OD (min. wall tk - 3.38 mm)
32 mm Nominal Size / 42.16 mm OD (min. wall tk - 3.56 mm)
RISING MAINS FROM BORE WELL TO U.G.R.
Excavating trenches upto 1.5 meter depth in all kind of soil of required width for pipes.
including excavation for sockets and dressing of sides ramming of bottoms including getting out
the excavated soil & then returning the soil as required, in layers not exceeding 20 cm in depth
including consolidating each deposited layer by ramming, watering, etc & disposing of surplus
excavated soil as directed within a lead of 50m or as directed at site by Engg-in-charge.
Pipes etc from 80 mm and above but not exceeding 300 mm dia.
Supply, laying, jointing, testing and commissioning of ISI marked P.V.C. pipes (80 SCH) as per
IS : 4984, including transportation upto the site, jointing by butt fusion / electro fusion welding,
providing and fixing all fittings i.e. bends, tees, couplers, junctions, tapers, reducers, adopters, end
caps, flanges with nut and bolts for fixing of appurtenances complete in all respects.
160 mm. OD.
210 mm. OD
Supply, fixing in position, testing ISI marked cast iron double flanged sluice valves as per
IS:14846-2000, (PN 10) with SS stem, bolts, nuts, 3 mm thick rubber gaskets including
transporting to worksite, Complete as per drawings & directions of the Engineer-in-charge.
160 mm. OD.
210 mm. OD
Providing Precast Cement Concrete / SFRC Valve Chamber cover and frame conforming to
IS : 12592-2002., The concrete mix should be not less than M 30.
Heavy duty, HD-20 grade designation - 600x600 mm internal size.
263
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR SEWERAGE AND DRAINAGE
Excavating trenches in all kind of soil of required width for pipes including excavation for
sockets and dressing of sides, ramming of bottoms, including getting out the excavated soil &
then returning the soil as required, in layers not exceeding 20 cm in depth including consolidating
each deposited layer by ramming, watering, etc & disposing of surplus excavated soil as directed
within a lead of 50m.
up to 1.50 m depth
Pipes 80 mm to 300 mm diameter
Supplying, fixing and testing PVC soil, waste and vent pipes (SWR) confirming to IS13592 :
1990, type B with rubber ring (confirming to IS 5382)with solvent joint inclusive of all necessary
specials like bends, tees, offsets, doorbends, junctions, screw type caps with rubber rings for
cleanout pipe ends, etc., suspended under floor slabs/fixed on walls or on pipe racks in shafts.
All suspenders, saddles, pipe packs are to be quoted separately under relevant items.
a) 110mm dia
b) 160mm dia
c) 200mm dia
d) 315mm dia
Encasing of PVC pipe with sand bed of 150mm thick all round wherever required. The scope of
work excludes the cost of pipes.
a) 110mm dia
b) 160mm dia
c) 200mm dia
d) 315mm dia
Supplying, fixing and testing salt glazed stoneware gully trap with rebated top square bodies
150mm x 150mm, CI grating 100mm dia outlet set in 75mm thick PCC 1:4:8 bed, 115mm thick
masonry chamber in CM 1:4, internal and external plastering 12mm thick in CM 1:6, supply and
fixing 300mm x 300mm size CI frame and cover, jointing to drain in CM 1:1, excavating,
refilling and ramming etc., complete.
Construction of inspection chamber with 230mm best quality approved Table Moulded bricks in
CM 1:4 over a bed of 100mm thick PCC 1:4:8, internal wall surfaces plastered in CM 1:3 and
external wall surfaces with CM 1:3 with sponge finish, benching and channelling in PCC 1:4:8.
Supplying and fixing SFRC frame & cover of size suitable for a clear internal size of chamber of
450 x 450mm (weight 182 Kgs.) and fixing MS Steps in position. The quoted rate shall also
include necessary excavation and back filling. Clear internal size of the chamber 600 x 600mm
maximum depth not exceeding 1200mm.
Construction of manhole with best quality, approved table moulded bricks in CM 1:6 over a bed
of 250mm thick PCC 1:4:8, walls plastered smooth inside in CM 1:3 and outside with CM 1:3
with sponge finish, benching and channeling in PCC 1:2:4. supplying and fixing MS steps as per
drawing for maintenance. The manhole shall be provided with medium duty SFRC frame and
cover of weight 182 Kgs. Circular 560mm dia. Clear opening etc., complete. The quoted rate
shall also include for necessary excavation, refilling, disposing off surplus earth with in a lead of
300M etc., complete.
264
CONTRACTOR NLUO
Providing Precast Cement Concrete / SFRC Manhole cover and frame conforming to IS :
12592-2002., The concrete mix should be not less than M 30.
Gully Trap cover / frame - 300 x 300 mm internal size.
Heavy duty, HD-20 grade designation - 600x600 mm internal size.
Providing Precast Cement Concrete / SFRC grating with frame conforming to IS : 12592-
2002. The concrete mix should be not less than M 30.
Medium duty, MD-10 grade designation - 500x450 mm internal size.
265
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR BOUNDARY WALL
Earth work in excavation for foundation trenches pits etc. in required width and depth upto 1.5
m including disposal of excavated earth, lead upto 50 m and lift upto 1.5 m, disposed earth to
be leveled and neatly dressed.
All kinds of soil
Disposal of excavated soil upto 200 m from excavated position, spreading the soil and leveled
etc. all complete.
Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc.
In layers not exceeding 20 cm in depth: consolidating each deposited layer by ramming and
watering lead upto 50 m and lift upto 1.5 m.
Supplying and filling in plinth and excavated area with sweet fine sand in layers not exceeding
20 cm in depth under floors including, watering, ramming consolidating and dressing
complete.
CEMENT CONCRETE (CAST-IN-SITU)
Providing and laying in position cement concrete of specified grade excluding the cost of
centring and shuttering - All work upto plinth level.
1:4:8 (1 cement : 4 coarse sand : 8 graded crusher broken granite stone aggregate 40 mm
nominal size).
PILE WORK
Boring, providing and installing cast in situ single under reamed piles of specified diametre
and length below pile cap in M 30 cement concrete, to carry a safe working load not less than
specified, excluding the cost of steel reinfrement but including the cost of boring with
bentonite solution and the length of the pile to be embedded in pile cap.
300 mm dia. Piles
Extra Bulb for boring, providing and installing cast in situ double under reamed piles, instead
of single under ream of specified diameter and length. (Only the quantity of extra bulbs are to
be paid).
CAST-IN-SITU R.C.C.
Providing and laying in position specified grade of reinforced cement concrete excluding the
cost of centring, shuttering, finishing and reinforcement-All height
1:2.4 (1 cement : 2 coarse sand : 4 graded crusher broken granite stone aggregate 20 mm
nominal size).
FORM WORK
Centring and shuttering including strutting, propping etc. and removal of form for :
Foundations, footings, columns, plinth beam & cooping etc. for mass concrete.
266
CONTRACTOR NLUO
Providing of steel reinforcement for R.C.C. work including straightening, cutting, bending,
placing in position and binding with 18 to 20 gauge binding wire etc. all complete. as per
direction of Engineer-in-charge.
Tor steel
BRICK WORK SUPERSTRUCTURE
Providing K.B. brick works (of 50 Kg. / sqcm) in cement mortar 1:6 in superstructure.
250 mm thick
CEMENT PLASTER (IN COARSE SAND)
16 mm thick cement plaster in cement mortar (1:6) smooth for inside surface of the wall after
racking out the joints including watering and curing with cost etc. all complete and as per
direction of Engineer-in-charge.
12 mm thick cement plaster in cement mortar (1:6) smooth for inside surface of the wall after
racking out the joints including watering and curing with cost etc. all complete and as per
direction of Engineer-in-charge.
DESIGN PLASTER
12 mm and 25 mm thick Design plaster provided over the 16 mm thick cement plaster in
cement mortat 1:5 in out side and inside surface of the boundary wall as per the design and
drawing etc. all complete and as per the direction of Engineer-in-charge.
Forming groove of uniform size from 12 x 12 mm and upto 25 x 15 mm in plastered surface as
per approved pattern using wooden battens, nailed to the under layer including removal of
wooden battens, repairs to the edges of plaster panel and finishing the groove complete as per
specifications and direction of the Engineer-in-Charge.
Providing & applying of cement coat paint into the outer surface of the wall including cost of
all materials etc. all complete and as per direction of Engineer-in-charge.
New work (Three or more coats)
Supplying and fixing at site Angle iron post & strut of required size including bottom to be
split and bent at right angle in opposite direction for 10 cm length and drilling holes upto 10
mm dia.etc. complete.
Fencing with angle iron post placed at required distance embedded in cement concrete blocks,
every 15th post, last but one end post and corner post shall be strutted on both sides and end
post on one side only and provided with horizontal line and two diagonals interwoven with
horizontal wires, of barbed wire 9.38 kg per 100m (minimum) between the two posts fitted and
fixed with G.l. staples, turn buckless etc. complete. (Cost of posts, struts, earth work and
concrete work to be paid for separately):- payment to be made per metre cost of total length of
barbed wire used as per direction of the Engineer-in-Charge/ Consultant.
With G.I barbed wire
267
CONTRACTOR NLUO
TECHNICAL SPECIFICATIONS FOR BARBED WIRE FENCING
Earth work in excavation for foundation trenches pits etc. in required width and depth upto 1.5
m including disposal of excavated earth, lead upto 50 m and lift upto 1.5 m, disposed earth to
be leveled and neatly dressed.
All kinds of soil
Supplying and filling in plinth and excavated area with sweet fine sand in layers not exceeding
20 cm in depth under floors including, watering, ramming consolidating and dressing
complete.
CEMENT CONCRETE (CAST-IN-SITU)
Providing and laying in position cement concrete of specified grade excluding the cost of
centering and shuttering - All work upto plinth level.
1:4:8 (1 cement : 4 coarse sand : 8 graded crusher broken granite stone aggregate 40 mm
nominal size).
1:2.4 (1 cement : 2 coarse sand : 4 graded crusher broken granite stone aggregate 20 mm
nominal size).
Supplying and fixing at site Angle iron post & strut of required size including bottom to be
split and bent at right angle in opposite direction for 10 cm length and drilling holes upto 10
mm dia.etc. complete.
Fencing with angle iron post placed at required distance embedded in cement concrete blocks,
every 15th post, last but one end post and corner post shall be strutted on both sides and end
post on one side only and provided with horizontal line and two diagonals interwoven with
horizontal wires, of barbed wire 9.38 kg per 100m (minimum) between the two posts fitted and
fixed with G.l. staples, turn buckless etc. complete. (Cost of posts, struts, earth work and
concrete work to be paid for separately):- payment to be made per metre cost of total length of
barbed wire used as per direction of the Engineer-in-Charge/ Consultant.
With G.I barbed wire
268
CONTRACTOR NLUO
TECHNICAL SPECIFICATIONS FOR SECURITY SHED,POLICE OUT POST & GATE
Earth work in excavation for foundation trenches pits etc. in required width and depth upto 1.5 m
including disposal of excavated earth, lead upto 50 m and lift upto 1.5 m, disposed earth to be
leveled and neatly dressed.
All kinds of soil
Supplying and filling in plinth and excavated area with sweet fine sand in layers not exceeding
20 cm in depth under floors including, watering, ramming consolidating and dressing complete.
CEMENT CONCRETE (CAST-IN-SITU)
1:4:8 (1 cement : 4 coarse sand : 8 graded crusher broken granite stone aggregate 40 mm nominal
size).
1:2:4 (1 cement : 2 coarse sand : 4 graded crusher broken granite stone aggregate 20 mm nominal
size).
CAST-IN-SITU R.C.C.
Providing and laying in position specified grade of reinforced cement concrete excluding the cost
of centering, shuttering, finishing and reinforcement.
1:1.5:3 (1 cement : 1.5 coarse sand : 3 graded crusher broken granite stone aggregate 20 mm
nominal size).
FORM WORK
Centering and shuttering including strutting, propping etc. and removal of form for :
Suspended floors, roofs, landings, balconies, lintels, beams, chajja and access platform.
STEEL REINFORCEMENT
Providing of steel reinforcement for R.C.C. work including straightening, cutting, bending,
placing in position and binding with 18 to 20 gauge binding wire etc. all complete.
Tor steel
BRICK WORK
Providing K.B. brick works (of minimum 50 Kg. / sqcm) in cement mortar 1:6 in foundation and
plinth.
250 mm thick
BRICK WORK SUPERSTRUCTURE
Providing K.B. brick works (of minimum 50 Kg. / sqcm) in cement mortar 1:6 in superstructure.
250 mm thick
269
CONTRACTOR NLUO
CEMENT PLASTER (IN COARSE SAND)
15 mm thick cement plaster in cement mortar (1:6) smooth for inside surface of the wall after
racking out the joints including watering and curing with cost etc. all complete and as per
direction of Engineer-in-charge.
PAINTING WORKS :
Providing two coats of approved shade cement paint into the outer surface of the wall over two
coats of primer etc. all complete including cost of all materials etc. all complete and as per
direction of Engineer-in-charge.
Providing of two coats of approved shade white wash over inside wall & ceiling surface over
one coat of primer including cost of all materials etc. all complete and as per direction of
Engineer-in-charge.
Painting with synthetic enamel paint of approved brand and manufacture of required colour to
give an even shade over a coat of primer.
Two or more coats on new work over an under coat of suitable shade with ordinary paint of
approved brand and manufacture.
WOOD WORK
CHOWKATH FITTING
Providing, fitting and fixing of 75 mm x 150 mm (after moulding) well seasoned Indian sal wood
chowkath in door & window opening area including coaltaring the wall side surface of chowkath,
100 mm iron clamp, screw, cutting the holes, filling the cutting holes in cement concrete (1:2:4)
etc. all complete and as per the direction of Engineer-in-charge.
FLUSH DOOR
Providing and fixing ISI marked 35 mm thick flush door shutters decorative type, core of block
board construction with frame of 1st class hard wood and well matched commercial board
shutters with ISI marked Stainless Steel butt hinges with necessary screws etc. all complete. The
door shall be finished with approved shade enamel paint of two coats over a coat of primer. 4
mm thick teak wood leaping shall be provided periphery of the door with teak wood beading
design and including all fittings etc. complete.
FLOORING :
2.5cm Artificial stone (A.S.) flooring with cement concrete (1:2:4) including punning using
12mm to 20mm gauge hard broken granites chips.
Providing, fitting and fixing of weather resistant steel gate & truss as per design including three
coats of synthetic enamel paint over one coat of primer etc. all complete.
270
CONTRACTOR NLUO
The rate inclusive of all materials, labour, T&P, royalties, taxes, fitting and fixing charges,
painting etc. all complete.
UPVC WINDOW FRAME
Providing and fixing of factory made uPVC 2-Track / 3-Track windows (White colour) made
of superior quality of uPVC materials.
Sliding 2-track frame will be multi-chambered hollow profile of size 60 mm x 60 mm with
outer wall thickness of 2mm. Duly reinforced with galvanized steel reinforcement of size with
thickness 1.2mm (+ 0.2mm). All the corners of frames and sash profiles will be fusion welded.
Sliding sash will be multi-chambered of size 35x55mm with outer wall thickness 2mm
(+0.2mm) duly reinforced with galvanized steel reinforcement of 1.2mm (+ 0.2mm) and fusion
welded at all corners.
After placing prescribed 5mm float glass in the sash, uPVC snap fed beading will be fixed.
EPDM weather sealed gasket, brush and interlock will be fitted wherever necessary. Window
will be fixed to the wall with 100mm long and 8mm dia fasteners. After fixing the window,
silicon will be affixed between the wall and the window to complete in all respects.
M.S. GRILL
Providing, fitting and fixing of window grill shall be made out of 12 mm square bar with 25 mm
x 25 mm x 6 mm M.S. angle, which shall be finished with approved shade enamel paint etc. all
complete and as per the direction of Engineer-in-charge.
TECHNICAL SPECIFICATION FOR SITE DEVELOPMENT
Filling the specified areas upto a depth of 5mtr with filling sand in layers not exceeding 0.3mtr
in depth., well watered, compacted, dressed and leveled to proper gradient including cost of all
materials, labour, conveyance, loading and unloading, taxes, royalities, sundries, tools and
plants, etc., complete as per the direction of the Engineer-in-charge.
Filling the specified areas upto a depth of 0.5mtr with good earth in layers over the areas filled
with filling sand well watered, compacted, dressed and leveled to proper gradient including cost
of all materials, labour, conveyance, loading and unloading, taxes, royalities, sundries, tools and
plants, etc., complete as per the direction of the Engineer-in-charge.
271
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR LANDSCAPING WORKS
1. Supplying and stacking of good earth at site including royality and carriage upto 1 km.
2. Supplying and stacking manure at site including royality and carriage upto 1 km.
3. Uprooting weeds from the trenched area after 10 - 15 days of its flooding with water
including disposal of uprooted vegetation.
4. Fine dressing the ground
5. Spreading of manure or / and good earth in required thickness (cost of manure or / and
good earth to be paid separately).
6. Mixing earth and manure in proportion specified or directed.
7. Grassing with Jaysia Japanica (carpet grass) / Barbuda Selection-I grass including
watering and maintenance of the lawn for 30 days or more till the grass forms a thick
lawn free from weeds and fit for moving including supplying good earth if needed.
(a) In rows 15 cm apart in either direction.
8. Uprooting rank vegetation and weeds by digging the area to a depth of 30 cm removing
all weeds and other growth with roots by forking repeatedly, breaking clods, rough
dressing, flooding with water, uprooting fresh growths after 10 to 15 days and then fine
dressing for planting new grass, including disposal of all rubbish with all leads and lifts.
9. Preparation of beds for hedging and shrubbery by excavating 100 cm deep and trenching
the excavated base to a further depth of 30 cm, refilling the excavated earth after
breaking clods and mixing with sludge or manure in the ratio of 8:1 (8 parts of stacked
volume of earth after reduction by 20% : one part of stacked volume of sludge or manure
after reduction by 8%), flooding with water, filling with earth if necessary, watering and
finally fine dressing, leveling etc. including stacking and disposal of materials declared
unserviceable and surplus earth by spreading and leveling as directed).
10. Supplying, providing and making of hedges of Goldenia / Kamini / Acalypha /
Amaranthus at site.
11. Supplying, providing and making of seasonal flower beds of Dahlia / Dianthus /
Erysimum / Hibiscus / Impatiens at site.
12. Supplying, providing and making of pathway side trees of Chinees Debdaru / Groping
Debdaru / Caltris / Juniperus / Thuja at site.
13. Digging holes in ordinary soil and refilling the same with the excavated earth mixed with
manure or sludge in the ratio of 2:1 by volume (2 parts of stacked volume of earth after
reduction by 20% : 1 part of stacked volume of manure after reduction by 8%) flooding
with water, dressing including removal of rubbish and surplus earth.
(a) Holes 1.2 m dia and 1.2 m deep
(b) Holes 60 cm dia, and 60 cm deep
272
CONTRACTOR NLUO
14. Providing of decorative hedges, decorative plants and perinial plants at suitable places.
15. Providing, fitting and fixing of water sprinkler and popup made of Nain bird / equivalent
for grasses lawn at an interval of 30'-0" in both the direction. (5'-0" shall be circular of
the water sprinkler etc. all complete.
16.
FOUNTAIN : FLORA MULTIPLE GEYSER FOUNTAIN
WATER PATTERN : 2” Gyser Nozzle at centre surrounded by 4 Nos.
of 11/2” Geyser Nozzle throughing water upward
in a milkish white color.
POOL SIZE REQUIRED : 7 mtrs dia
WATER EFFECT : Centre jet = 10‟, Outer jet =4 ‟ (Max.Approx)
PUMP SET : 5 HP Three phase Submersible Open-well Pump
ILLUMINATION : 12 Nos. of waterproof lights of 150 watt 230 volt.
CABLE/ PANNEL BOARD : Cable for pump set and lights up to 10mtrs.
Distance with suitable panel board.
FOUNTAIN : FLORA TRIPLE GEYSER FOUNTAIN
WATER PATTERN : 11/2” Geyser Nozzle at centre surrounded by
1” Geyser Nozzle at both side throughing water
upward in a milkish white color.
POOL SIZE REQUIRED : L-12‟ & B-7‟
WATER EFFECT : Centre jet = 6‟, Outer jet = 3‟ (Approximately)
PUMP SET : 1.5 HP Single phase Submersible Open-Well
Pump
ILLUMINATION : 7 Nos. of waterproof lights of 150 watt 230 volt
CABLE/ PANNEL BOARD : Cable for pump set and lights upto 10mtrs.
Distance with suitable panel board.
FOUNTAIN : FLORA GEYSER FOUNTAIN
WATER PATTERN : 11/2” Geyser Nozzle at centre throughing water
upward in a milkish white color.
POOL SIZE REQUIRED : 8‟ DIA
WATER EFFECT : 3‟ ht (Approximately)
PUMP SET : 1HP Single phase Submersible Open-Well Pump
ILLUMINATION : 3 Nos. of waterproof lights of 150 watt 230 volt
CABLE/ PANNEL BOARD : Cable for pump set and lights upto 10mtrs.
Distance with suitable panel board.
FOUNTAIN : FLORA GALAXY OF GEYSER FOUNTAIN
WATER PATTERN : 15 nos of 1” Geyser Nozzle throughing water
273
CONTRACTOR NLUO
upward in a milkish white color.
POOL SIZE REQUIRED : L-25‟ & B-12‟
WATER EFFECT : 2‟-4‟ ht (Approximately)
PUMP SET : 5HP Three phase Submersible Open-Well Pump
ILLUMINATION : 15 Nos. of waterproof lights of 150 watt 230 volt
CABLE/ PANNEL BOARD : Cable for pump set and lights upto 10mtrs.
Distance with suitable panel board.
FOUNTAIN : FLORA HALF-BALL FOUNTAIN(3‟ dia)
: 3ft dia Half-ball of foaming water seemingly
WATER PATTERN suspended in the air
POOL SIZE REQUIRED : 15‟ dia
PUMP SET : 2Hp Single phase Submersible Pump
ILLUMINATION : 4 x 3 colors = 12 Nos. of waterproof lights
CABLE/ PANNEL BOARD : Cable for pump set and lights upto 10mtrs.
Distance with suitable panel board
FOUNTAIN : FLORA HALF-BALL FOUNTAIN(3‟ dia)
: 3ft dia Half-ball of foaming water seemingly
WATER PATTERN suspended in the air
POOL SIZE REQUIRED : 15‟ dia
PUMP SET : 2Hp Single phase Submersible Pump
ILLUMINATION : 4 x 3 colors = 12 Nos. of waterproof lights
CABLE/ PANNEL BOARD : Cable for pump set and lights upto 10mtrs.
Distance with suitable panel board
TECHNICAL SPECIFICATIONS FOR
CHILDREN‟S PLAY UNIT & GARDEN CHAIR
01. SEA-SAW
Four seated, Seat: FRP make, Sea-Saw Bar: 8‟-00” length each with handle, Support
pipe: Length- 6‟-00”, Height-3‟-00”.
02. PLAIN SLIDE (FRP) Height: 5‟,Length: 13‟-00”
03. FRP GARDEN CHAIR- Length:6‟-00”, Height: 1‟-6”. Pipe:1” dia
04. All main support pipes of MPPS is 3” I.D. B-Class (medium) ISI mark (1239)
05. All Climbers, vertical ladder and pipes ladder 1 ½”, 1 ¼” & ¾” I.D. B-Class (medium)
274
CONTRACTOR NLUO
06. All decks top made of FRP (Fiber glass Reinforcement Plastic) thickness 8mm
07. All FRP slides thickness 8mm both side smooth gel coat finish (without wide slide)
08. All equipments painted with Etch Primer (h) Epoxy zinc Primer & the best quality 2
coats of POLYURTHEN paint
(Non-Hazardous Aliphatic Grade)
09. Zinc plated Nuts & Bults with rubber cap.
275
CONTRACTOR NLUO
TECHNICAL SPECIFICATIONS FOR CONSTRUCTION OF U.G.R.
All Kinds of Soil including removal of existing platform, flooring, foundation / footing of structures
from 0 to 4.0m depth
Filling available excavated earth (excluding rock, black cotton clayey soil) in trenches, plinth, sides
of foundations etc. in layers not exceeding 20 cm in depth: consolidating each deposited layer by
ramming and watering in all leads and lifts
Disposal of surplus earth up to all leads as directed by the Architect/Project Director including
spreading the earth in the land fill and dressing neatly either within the Site or outside the
compound.
Supplying and filling with fine river sand under footings, floors including, watering, ramming
consolidating and dressing complete.
Supplying, Diluting and injecting chemical emulsion for PRE-CONSTRUCTIONAL anti-termite
treatment and creating a continuous chemical barrier under and all-round the column pits, wall
trenches, basement excavation, top surface of plinth filling, junction of wall and floor, along the
external perimeter of building, expansion joints, over the top surface of consolidated earth
surroundings of pipes and conduits etc. complete as per specifications
Chloropyriphos emulsi-fiable concentrates 20%.
Providing and laying in position cement concrete of specified grade, including the cost of centering
and shuttering. All work up to plinth level.
1:5:10 (1 cement: 5 coarse sand: 10 graded stone aggregate 40 mm nominal size). (under the
footings as matt concrete)
Providing and laying in position machine batched, machine mixed and machine vibrated nominal
mix cement concrete of specified grade for reinforced cement concrete structural elements including
the cost of centering, shuttering, hacking the exposed surface wherever required to receive plaster,
finishing and admixtures in recommended proportions (as per IS: 9103) to accelerate, retard setting
of concrete improve workability without impairing strength and durability as per directions of
Project Director/Architect. but excluding the cost of reinforcement M-25 grade reinforced cement
concrete.
In Raft Slab for the foundation
Side retaining walls
Roof slab and beams
Reinforcement for R.C.C. work including transporting, decoiling, straightening, cutting bending,
placing in position and binding all complete at all levels and in all R.C.C. items with 18 gauge
binding wire and cover blocks.
Thermo mechanically treated bars. Grade Fe 500 High Yield strength deformed bars confirming to
IS1786
Brick work with bricks of class designation 75 in superstructure in cement mortar 1:6 (1 cement : 6
coarse sand) above plinth level up to forth floor, lift machine room level including square or
276
CONTRACTOR NLUO
rectangular pillars, including raking out of joints, scaffolding, watering, curing etc; all complete.
Construction of brick steps with of well burnt bricks of class 75 with cement mortar 1:3 including of
chipping cutting and shaping the bricks to the necessary shape and size as required and finishing the
same with rough cement slurry coat for receiving the finishing tile above and side of steps.
1500mm width (150mmx300mm)
Supplying, fabricating and erecting steel gate of standard M.S. angles, tees, flats, tubular sections,
bars as per detailed drawing including all standard fixtures such as hold fast, washers, M.S rods,
flap locking arrangement, stoppers, gusset plate, L bolts 300mm long, roller and guides including
applying a coat of primer
Providing and laying broom finished 75 mm thick cement concrete flooring 1:2;4 (1 cement:2 coarse
sand:4 graded stone aggregate 12.5 mm nominal size), nosing and 40 x 4 mm PVC strips etc.
complete
Supplying & Providing UPVC sliding window with single glazing & fly proof mesh shutters out of
unplasticised poly vinyl chloride (UPVC) profiles having a nominal outer wall thickness of 2.5mm
with outer frames of 60 x 52mm minimum sizes & shutter frame of 35 x 75mm sizes (minimum)
having fusion welded corners with 1mm thk structural reinforcement hot dip galvanized to a
thickness of 125 GSM with gaskets out of Ethylene Propylene Diameter (EPDM). The fly proof
shutter shall be mounted on the same frames with SS mesh of grade 304
Applying three or more coats of white washing with lime to given an even shade for ceiling, pump
room and other Rooms, wherever necessary.
Providing and laying water proofing treatment to vertical surfaces of the U.G. Sump consisting of
the following operations.
RCC surface to be cleared of all dirt, loose material and kept dry and holes/cracks to be repaired
with cement putty using bonding agent of approved manufacturers. The prepared surface shall be
coated with two coats of acrylic polymer modified cementations (PMC) slurry coating up to the
finished floor level. The second coat shall be applied after the first coat has dried.
Applying one coat of acrylic polymer modified cement brush topping over PMC slurry coating after
the last PMC slurry coat has dried.
Providing a protective layer over the treated surface by laying 20 mm thick cement plaster 1:4
(1 cement:4 coarse sand) mixed with approved water proofing compound when the treatment sets
dry.
Providing and laying integral cement based water proofing treatment including preparation of
surfaces as required for treatment of roofs and terraces consisting of the following operations:
Lime concrete terracing on roofs, average thickness 10cm laid to fall with 25mm nominal size brick
aggregate and 50% lime mortar 1:2(1 lime putty :2 surkhi) rammed and finished with gur and belgiri
treatment complete and covered with fly pressed fully burnt clay tiles of 20mm thick nominal
thickness and approved size grouted with cement mortar 1:3 (1 cement : 3 Fine sand) mixed with 2%
integral water proofing compound by weight of cement, over 12mm layer of cement mortar 1:3 (1
277
CONTRACTOR NLUO
cement : 3 fine sand) and finished neat with proper pointing.
Providing and laying integral cement based treatment for water proofing on horizontal surface of
Under Ground Sump and Water Treatment Plant as under
Over the top of lean concrete under the RCC matt slab and column footings (vertical as well as
horizontal surface) one coat of 20 mm thick base plaster in cement mortar 1:3 (1 cement: 3 sand,
50% fine sand and 50% coarse sand) when the surface is still green with approved make integral
water proofing compound shall be provided @ 0.2% by weight of cement and cured for 2 to 3 days
of finishing.
Thereafter two coats of two component polymer modified heavy duty cementations coating (Acrylic
reinforced cementations flexible water proof coating) shall be applied @ 2 Kg per sqm or as per
manufacturers specification and as approved by Architect/Project Director. This compound shall be
applied over properly rendered and pre wetted surface, while not having stagnated water.
After a minimum period of 24 hours the coating shall be covered with another 15 mm thick cement
plaster in Cement mortar 1:4 ( 1cement :4 sand: 50% fine sand and 50% coarse sand) with approved
integral water proofing compound confirming to IS: 2645 @ 0.2% by weight of cement and cured
for 2 to 3 days after one day of finishing.
Placing and fixing 12 mm N.B.M.S. threaded nozzles of 75 mm length with dummy rod for
maintaining the hold up to required depth in an approximate grid pattern at a spacing not exceeding
1.5 m c/c on the entire raft prior to or during concreting. Similar threaded nozzles along with
dummy rod shall also be fixed at a regular intervals not exceeding 1.5 mt. apart along with
construction joints. Similar nozzles les shall also be post fixed at critical points as per
manufacturer‟s requirements and directions of Architect/Project Director by drilling or making
holes.
Injection of approved water proof grouting compound admixed with cement slurry through nozzles
under pressure by pump. The grout should flow through all pores and voids thereby sealing them.
The nozzles shall be sealed off after injection operation is over with pozzolith 100 HE admixed with
cement.
Providing and laying integral cement based treatment for water proofing on vertical surface of
basement, under ground water tank, swimming Pool etc. and horizontal & vertical surface of over
head tank as under
The construction joints in the walls and slab shall be provided and fixed with water swelling water
bar (swelling gasket) of size 20 mm x 10mm in between the joints through out its entire length or as
per approved manufacturers specification and approved by Architect/Project Director .
`After proper curing of the RCC, the outer surface shall be coated with 2 coats of two component
approved polymer modified heavy duty cementations coating (Acrylic reinforced cementations
flexible water proof coating) to form a coating of 1.5 mm thickness. Compound shall be applied
over pre wetted surface.
Thereafter the coating shall be covered with 12 mm thick plaster in cement mortar 1:4 (1cement:4
sand: 50% fine sand and 50% coarse sand) mixed with approved integral water proofing compound
confirming to IS: 2645 @ 0.2% by weight of cement and finished with a coat of neat cement slurry.
278
CONTRACTOR NLUO
Providing and placing in position suitable P.V.C water stops conforming to I.S 12200 of 'Deep-Jyoti'
or approved equivalent for constructions / expansion joints between two R.C.C members and fixed
to the reinforcement with binding wire before pouring concrete etc. complete Serrated with central
bulb (225mm wide, 8 -11mm thick)
Providing and fixing in the tank with rust proof brackets, factory made aluminum ladder 450mm
wide out of, 'C' shaped side member 67x31x3.2mm and treads 63mm wide 2mm thick at 300ctoc
with rubber buffers at top and bottom of side member etc. complete.
MONOBLOCK LIFT PUMP: Supplying and commissioning of mono-block lift
pump(Conforming to IS Specification) of 15HP and 20m head for the provision of water supply
to the over head tank for domestic use.
279
CONTRACTOR NLUO
TECHNICAL SPECIFICATIONS FOR
CONSTRUCTION OF SEWAGE TREATMENT PLANT.
All Kinds of Soil including removal of existing platform, flooring, foundation / footing of
structures from 0 to 1.5m depth (measurements for rates as per drawing only)
1.5m to 4.0m depth (measurements for rates as per drawing only)
Filling available excavated earth (excluding rock, black cotton clayey soil) in trenches, plinth,
sides of foundations etc. in layers not exceeding 20 cm in depth: consolidating each deposited
layer by ramming and watering in all leads and lifts(consolidated volume will be measured for
PAYMENT)
Disposal of surplus earth up to all leads as directed by the Architect/Project Director
including spreading the earth in the land fill and dressing neatly either within the Site
or outside the compound.
Supplying and filling with fine river sand under footings, floors including, watering, ramming
consolidating and dressing complete.
Supplying, Diluting and injecting chemical emulsion for PRE-CONSTRUCTIONAL anti-
termite treatment and creating a continuous chemical barrier under and all-round the column
pits, wall trenches, basement excavation, top surface of plinth filling, junction of wall and
floor, along the external perimeter of building, expansion joints, over the top surface of
consolidated earth surroundings of pipes and conduits etc. complete as per specifications
(plinth area of the building at ground floor only shall be measured).
Chloropyriphos emulsi-fiable concentrates 20%.
CONCRETE WORK
Providing and laying in position cement concrete of specified grade, including the cost of
centering and shuttering. All work up to plinth level.
1:5:10 (1 cement : 5 coarse sand :10 graded stone aggregate 40 mm nominal size).( under the
footings as matt concrete)
REINFORCED CEMENT CONCRETE WORK :
Providing and laying in position machine batched, machine mixed and machine vibrated
nominal mix cement concrete of specified grade for reinforced cement concrete structural
elements including the cost of centering, shuttering, hacking the exposed surface wherever
required to receive plaster, finishing and admixtures in recommended proportions (as per IS:
9103) to accelerate, retard setting of concrete improve workability without impairing strength
and durability as per directions of Project Director/Architect. but excluding the cost of
reinforcement M-20 grade reinforced cement concrete.
In Raft Slab for the foundation
Side retaining walls
Roof slab and beams
Reinforcement for R.C.C. work including transporting, decoiling, straightening, cutting
bending, placing in position and binding all complete at all levels and in all R.C.C. items with
18 gauge binding wire and cover blocks. (Rebate includes binding wire, chairs, spacers which
will not be measured separately for payment.)
Thermo mechanically treated bars. Grade Fe 500 High Yield strength deformed bars
confirming to IS1786
BRICK WORK
Brick work with bricks of class designation 75 in superstructure in cement mortar 1:6
(1 cement : 6 coarse sand )above plinth level up to forth floor, lift machine room level
including square or rectangular pillars, including raking out of joints, scaffolding, watering,
curing etc; all complete
Construction of brick steps with of well burnt bricks of class 75 with cement mortar 1:3
including of chipping cutting and shaping the bricks to the necessary shape and size as
required and finishing the same with rough cement slurry coat for receiving the finishing tile
above and side of steps.
1500mm width (150mmx300mm)
STEEL WORK
Supplying, fabricating and erecting steel gate of standard M.S angles, tees, flats, tubular
sections, bars as per detailed drawing including all standard fixtures such as hold fast,
washers, M.S rods, flap locking arrangement, stoppers, gusset plate, L bolts 300mm long,
roller and guides including applying a coat of primer
FLOORING
Providing and laying broom finished 75 mm thick cement concrete flooring 1:2;4 (1 cement:2
coarse sand:4 graded stone aggregate 12.5 mm nominal size), nosing and 40 x 4 mm PVC
strips etc. complete
(UPVC WINDOWS & VENTILATORS)
Supplying & Providing UPVC sliding window with single glazing & fly proof mesh shutters
out of unplasticised poly vinyl chloride (UPVC) profiles having a nominal outer wall thickness
of 2.5mm with outer frames of 60 x 52mm minimum sizes & shutter frame of 35 x 75mm sizes
(minimum) having fusion welded corners with 1mm thk structural reinforcement hot dip
galvanized to a thickness of 125 GSM with gaskets out of Ethylene Propylene Diameter
(EPDM). The fly proof shutter shall be mounted on the same frames with SS mesh of grade
304.refer www.coampvc.com
FINISHING :
Applying three or more coats of white washing with lime to given an even shade for ceiling,
281
CONTRACTOR NLUO
pump room and other Rooms, wherever necessary.
WATER PROOFING/ROOFING
Providing and laying integral cement based water proofing treatment including preparation of
surfaces as required for treatment of roofs and terraces consisting of the following
operations:
Lime concrete terracing on roofs, average thickness 10cm laid to fall with 25mm nominal size
brick aggregate and 50% lime mortar 1:2(1 lime putty :2 surkhi) rammed and finished with gur
and belgiri treatment complete and covered with flpressed fully burnt clay tiles of 20mm
thick nominal thickness and approved size grouted with cement mortar 1:3 (1 cement : 3 Fine
sand) mixed with 2% integral water proofing compound by weight of cement, over 12mm
layer of cement mortar 1:3 (1 cement : 3 fine sand) and finished neat with proper pointing.
Providing and laying integral cement based treatment for water proofing on horizontal and
surfaces of Under Ground Sewage Treatment Plant as under
Over the top of lean concrete under the RCC matt slab and column footings (vertical as well as
horizontal surface) one coat of 20 mm thick base plaster in cement mortar 1:3 (1 cement: 3
sand, 50% fine sand and 50% coarse sand) when the surface is still green with approved make
integral water proofing compound shall be provided @ 0.2% by weight of cement and cured
for 2 to 3 days of finishing.
Thereafter two coats of two component polymer modified heavy duty cementations coating
(Acrylic reinforced cementations flexible water proof coating) shall be applied @ 2 Kg per
sqm or as per manufacturers specification and as approved by Architect/Project Director. This
compound shall be applied over properly rendered and pre wetted surface, while not having
stagnated water.
After a minimum period of 24 hours the coating shall be covered with another 15 mm thick
cement plaster in Cement mortar 1:4 ( 1cement :4 sand: 50% fine sand and 50% coarse sand)
with approved integral water proofing compound confirming to IS: 2645 @ 0.2% by weight of
cement and cured for 2 to 3 days after one day of finishing.
Placing and fixing 12 mm N.B.M.S. threaded nozzles of 75 mm length with dummy rod for
maintaining the hold up to required depth in an approximate grid pattern at a spacing not
exceeding 1.5 m c/c on the entire raft prior to or during concreting. Similar threaded nozzles
along with dummy rod shall also be fixed at a regular intervals not exceeding 1.5 mt. apart
along with construction joints. Similar nozzles les shall also be post fixed at critical points as
per manufacturers requirements and directions of Architect/Project Director by drilling or
making holes.
Injection of approved water proof grouting compound admixed with cement slurry through
nozzles under pressure by pump. The grout should flow through all pores and voids thereby
sealing them. The nozzles shall be sealed off after injection operation is over with pozzolith
282
CONTRACTOR NLUO
100 HE admixed with cement.
Providing and laying integral cement based treatment for water proofing on vertical surface of
basement, under ground water tank, swimming Pool etc. and horizontal & vertical surface of
over head tank as under
The construction joints in the walls and slab shall be provided and fixed with water swelling
water bar (swelling gasket) of size 20 mm x 10mm in between the joints through out its entire
length or as per approved manufacturers specification and approved by Architect/Project
Director .
`After proper curing of the RCC, the outer surface shall be coated with 2 coats of two
component approved polymer modified heavy duty cementations coating (Acrylic reinforced
cementations flexible water proof coating) to form a coating of 1.5 mm thickness . Compound
shall be applied over pre wetted surface.
Thereafter the coating shall be covered with 12 mm thick plaster in cement mortar 1:4 (
1cement :4 sand: 50% fine sand and 50% coarse sand) mixed with approved integral water
proofing compound confirming to IS:2645 @ 0.2% by weight of cement and finished with a
coat of neat cement slurry.
MISCELLANEOUS WORK
Providing and placing in position suitable P.V.C water stops conforming to I.S 12200 of
'Deep-Jyoti' or approved equivalent for constructions / expansion joints between two R.C.C
members and fixed to the reinforcement with binding wire before pouring concrete etc.
complete Serrated with central bulb (225mm wide, 8 -11mm thick)
Providing and fixing in the tank with rust proof brackets, factory made aluminum ladder
450mm wide out of, 'C' shaped side member 67x31x3.2mm and treads 63mm wide 2mm thick
at 300ctoc with rubber buffers at top and bottom of side member etc. complete.
The FFBT Treatment System based on FIXED FILM BIO TECHNOLOGY to achieve
low BOD.
1. EFFLUENT GENERATION AND CHARACTERISTICS
1.1 RAW INFLUENT CHARACTERISTICS
The flow rates and other characteristics of the Waste Water generated from the
PROCESS and DOMESTIC waste.
283
CONTRACTOR NLUO
DESIGN PARAMETERS AND TREATED WATER PARAMENTER
S.NO. PARAMETERS INFLUENT VALUE EFFLUENT VALUE
1.0 Flow 200 KLD 200 KLD
2.0 Oil & Grease 20-30 Mg/L < 10 Mg/L
3.0 Ph 6-9 6-7.5
4.0 BOD 150-200 mg/L <30 Mg/L
5.0 COD 500 Mg/L <250 Mg/L
6.0 SS 150 Mg/L < 100 Mg/L
7.0 Design Flow 12.5 M3/Hr 12.5 M3/Hr
8.0 Surfactant 1-3 Mg/L < 2 Mg/L
9.0 Appearance Turbid Clear and free from foul
smell
10.0 E.Col. Bacteria - Nil
2. PROCESS DESCRIPTION
a. PROCESS SCHEME
The proposed scheme for the proposal is based on the Moving Fixed Film Bio
Technology of which the main parts have been described as below :
 Bar Screen Chamber with Bar Screen
 Anaerobic Chamber duly partitioned from inside
 BIO REACTOR Tank- For Aerobic Digestion
 Tube Settler media with Tube settler Tank
 Chlorine Dosing System
 Filter Feed Sump
284
CONTRACTOR NLUO
 Multigrade Media Filter
 Activated Carbon Filter
 Electric Control Panel
 V Notch Weir
285
CONTRACTOR NLUO
1. SCREEN CHAMBER
The Combined effluent streams are passed through bar screens. A manually operated
286
CONTRACTOR NLUO
1 No. Coarse bar screen is provided at the inlet to the tank through which the effluent
enters in to the screen chamber.
The screen removes any large foreign objects present in wastewater that may damage the
waste water transfer pumps .
2. ANEROBIC CHAMBER :
An Anaerobic Chamber is a RCC M20 Grade 3.5 m deep collection tank of the raw sewage
after screening and is normally divided into three parts internally to provide 24 hours of
retention time for Anaerobic Reaction to take place in absence of air. in this chamber the
anaerobic Bacteria become active and digest app. 20-25% of the bio sewage . The methane
gas thus generated during process goes through the sump vent pipes.
3. BIO Reactor Tank :
In the Bio Reactor also known as Aeration Tank, the wastewater containing micro-
organism are put into contact with air in the form of dissolved oxygen provide by a Blower
through fine Bubbles.
Micro organism assimilates the organic matter present in wastewater. The mixed liquor
suspended solids is maintained at the levels of 4,500 mg/L – 6,000 mg/L. The bottom of
the aeration tank is covered with submersed fine bubble air diffusers. The compressed air
is to be supplied through positive displacement (roots type) air blowers (one working + one
standby) located outside the tank. Submersed air diffusers will provide mixing and oxygen
for the needs of micro-organism. The blowers will be sized to maintain dissolved oxygen
level in the aeration tank of approx. 2.0 mg/L.
Two nos. rotary air blowers that operate on one working and one stand-by basis supplying
air to aeration tank. GI pipe air header to the aeration tank where it is distributed through
lateral air Fine air bubble diffusers.
Each diffuser contains thousands of micron size pores through which the air is forced out
into the surrounding wastewater as very fine bubbles. The enormous surface area of the
millions of fine air bubbles is generating and speeds up.
Oxygen diffusion into the wastewater. In this way, dissolved oxygen is supplied to the
aeration tank, which in turn is consumed by the aerobic bacteria present in aeration tank to
biodegrade the organic matter present in the waste water. The constant air bubbling also
ensures adequate and homogeneous mixing in the aeration tank.
Hence it becomes is the most cost effective and energy efficient system as compared to
coarse air bubble diffusion and /or mechanical surface aeration systems
287
CONTRACTOR NLUO
4. TUBE SETTLER
From the BIO Reaction Chamber, semi treated effluent water will be fed to the tube settler.
The active area of the tube settler is designed to provide the enough settlement of the
suspended materials. It is provided with central feed chamber with effluent entry. The tube
settler will be filled with Tube deck for separation of Bio mass. There will be top chamber
for the collection of clarified treated effluent. Proper mechanisms will be provided for
supporting the media. The solid will settle in the tube settler. The settled sludge from the
Tube settler is also provided with a skimmer system to recycle the sludge recycling. An
overflow weir with scum baffle is provided in the clarifier to take treated wastewater out
of the tube settler. The treated wastewater will flow under gravity through V-notch system
from tube settler to out let of the unit. Tube Settler Tank is constructed out of RCC with
required mechanical fittings etc.
5. The principal application of this process
 The removal of the carbonaceous organic matter in wastewater. Carbonaceous
organic is usually measured as biological oxygen demand (BOD), total organic
carbon (TOC) and/ or chemical oxygen demand (COD)
 Nitrification – Biological oxidation of organic nitrogen as measured by total
Kjeldahl nitrogen (TKN) and ammonia – N.
 Denitrification – Biological removal of nitrates.
 Stabilization – Making the bacterial cell tissue produced in the treatment process
suitable for disposal.
6. CHLORINE CONTACT CHAMBER
This system is made out of RCC M20. This system will have “chlorine distributor” for
homogeneous mixing process and required fittings and mounting etc for collection and
distribution of water flow. Since the semi treated water contents millions of bacteria
and pathogens hence it is to be disinfected prior to disposal by using Electronic
Chlorine dosing system.
7. Multigrade Pressure Sand Filter in Non Corrosive FRP Vessels
We offer Non Corrosive FRP produced Multigrade Sand Filter model #MGF 4272
having flow-rate of 15M3/hr and service cycle 24 hours. The unit is fitted with Inlet
distribution systems and out let collecting systems frontal pipe work assembly,
flanged control valves, two sets of inlet and out let pressure gauges with sampling
points, one charge of graded under bed material and one charge of sieved and washed
Quartz filter bed media.
288
CONTRACTOR NLUO
8. ACTIVATED CARBON FILTER
We offer Non Corrosive FRP produced Activated Carbon Filter model ACF-4272
having flow-rate of 15M3/hr and service cycle 24 hours. The unit is complete with
Inlet distribution and out let collecting system, frontal pipe work assembly, flanged
control valves, two sets of inlet and out let pressure gauges with sampling points, one
charge of graded under bed material and one charge of sieved and washed filter media
along with 8/16 mesh high capacity activated carbon 900 I.V.
9. LABORATORY
It is mandatory to maintain a laboratory to test the influent and effluent water
quality to monitor the plant performance day by day. The offered lab will have the
testing apparatuses and meters etc for the following parameters like BOD, COD,
PH, TDS, and SS & BACTERIA. Lab is normally made of RCC followed by
brickwork, PCC and slab, wash basin etc.
B. SPECIFICATION OF CIVIL STRUCTURAL
1. Details of Screen Chamber
No. of Compartments : 1
Material of Construction : RCC M-20
Plan Dimensions : 1. M x 1. M
Side Water Depth : 1.0 M
2. Details of Basement
No. off : 1
Material of construction : RCC M-20
Plan dimensions : 21 M x 6 M x 5 M
3. Details of Equalization cum Collection Tank
No. of Unit : 1
Material of Construction : RCC M-20
Plan Dimensions : 4Mx3M
Side Water Depth : 3.5 M
4 Details of Chlorine contact chamber
Material of Construction : RCC M-25 with FRP Coating
Plan Dimensions : 1.0 M x 1.0 M
Side Water Depth : 2.8 M
C. DETAILS OF MECHANICAL EQUIPMENTS
289
CONTRACTOR NLUO
1. Bar Screen
Type : Removable Type
Size : 1.0 x 0.8 Mtr
Bar Size : Flats, 20 mm x 6 mm
Bar Spacing : 20 mm
MOC : MS Epoxy
Cleaning : Manual
Make : AWI
 Wastewater Transfer Pumps
Nos. : 02 Nos.
Type : Non Clog Centrifugal Self priming Pump
Capacity : 12.5-15 m3/hr
Head : 10 M CI Body and Impeller.
Motor HP-2-3, RPM 1440,
Coupling base frame & Foundation bolt
Make : Kirloskar, Crompton & Greaves ,
3. Aeration Grid
Nos. : 1 Set
Type : Fine bubble EPDM Diffusers
Size : 65 x 600
Qty : 30 Nos
Design : Submerged removal type
4. Sludge Recycling System
Nos. : 1 set
Type & design : Non Clog Centrifugal Self priming Pump
Make : Kirloskar, Crompton & Greaves ,
5. Air Blowers
Nos. : 02 Nos.
Type : Roots type for Aeration
Capacity : 150-200 M3/Hr
Pressure : 5 MWC
Accessories : Silencer, NRV, p.Guage, B. frame Valve
Make : Everest/ / Usha/ Eq
6.0 Sod Hypochlorite Dosing System
Nos. : 2 Nos. (1w1s)
Capacity : 6 lph
290
CONTRACTOR NLUO
Back pressure : 3.5 Kg
Accessories : PVC Tubing, NRV, Foot Valve
Type : Positive displacement electronic type
Tank : HDPE/PVC/FRP 100 Ltr
MOC : PP/MSEP.
7.0 Flow Measuring Devices
Quantity : 01
Type : V Notch Type at inlet or outlet
MOC : SS 304
8.0 Tube dek
Qty : 5-6 M3
MOC : PVC/HDPE
Size : 750 mm
Make : MM Aqua / Equi
09. Electric Control Panel
No. off : 1
Size : 0.75 Mtr x 0.75 Mtr x 0.3 Mtr
Single Phase Preventer : Provided
MOC : MS Powder coated
HP : 20 HP Approximate
KW Meter : Provided
AM Meter : Provided
Starter : Dual
Push Button on off : Provided
Components : L & T/ Snieder
Volt Meter : Provided
Over Load Alarm : Provided
Indicator Light : Provided
10. Pipes & Valves
No. Off : 1 Set
MOC : UPVC/CPVC/PPR
Qty. : Inlet to disposal of STP
11. Filter Feed Pump
Nos. : 02 Nos.
Type : Non Clog Centrifugal Self priming
Capacity : 15 m3/hr
Head : 30-35 M CI Body and
291
CONTRACTOR NLUO
Minimum Motor HP-3, RPM 2800,
Coupling base frame & Foundation bolt
Make : Kirloskar, C&G,
12. Instrumentation
Magnetic Flow meter : 2 Nos
Level controller : 2 Sets
Pressure gauges : 1 Lot
D.O.Meter : 1 Set
On line PH Meter : 1 Set
13. Laboratory equipment
For BOD : 1 set
For COD : 1 Set
For TDS : 1 Set
For PH : 1 set
For SS : 1 Set
For Bacteria Slides : 1 Set
14. Multi Grade Pressure Sand Media Filter
Diameter : 1226 mm
HOS : 2070 mm
Frontal Pipe work : 50 NB
No. Valves : 1 Multipart Type
Type of Valves : Butterfly / Intervalve make
Media : Graded quartz media and anthracite
Depth of media : 900 mm
MOC : FRP
Collection System : Flower Type
Filtration rate : 10 M3/Hr/M2
Qty : 1 Set
15. Activated Carbon Filter
Diameter : 1226 mm
HOS : 2070 mm
Frontal Pipe work : 50NB
No. Valves : 1 No. Multipart Type
Type of Valves : Butterfly / Intervalve make
Media : Graded quartz media & Anthracite
Activated carbon 8/16 mesh 900 I.V. ICB
Depth of media : 900 mm
MOC : FRP
Collection System : Flower Type
Filtration rate : 10 M3/Hr/M2
Qty : 1 Set
292
CONTRACTOR NLUO
16. ACCESSORIES FOR VARIOUS MECHANICAL EQUIPMENT
Ladders to equipment
Tube deck for Tube settler
Piping net work of UPVC/CPVC/PPR with control valves
FFBT Media
Control Valves Cabling for motors.
MONOBLOCK LIFT PUMP: Supplying and commissioning of mono block lift pump of
10hpand 20m head for supply of treated water to flushing tank.
Note : The Contractor shall provide one year maintenance of S.T.P.
293
CONTRACTOR NLUO
RAIN WATER COLLECTION ROOM
1 Earth work in excavation for foundation, traches, pits in all kinds of soil etc. in required
width and including disposal of excavated earth lift upto 200 mtr, disposed earth to be
levelled and neatly dressed etc. all complete.
2 Filling foundation trenches and plinths with sand, well watered, compacted, dressed and
leveled to proper gradient complete as per the direction of the Engineer-in-charge.
3 Providing and laying of P.C.C. of 1:4:8 (1 cement : 4 coarse sand : 8 graded crusher
broken granite stone aggregate 40 mm nominal size) in foundation trenches, under floors
in line level including curing and ramming etc. all complete, as per requirement and
direction of Engineer-in-charge.
4 Providing lifting, hoisting and laying reinforced cement concrete to all type of concreting
work to base of columns and footing, columns, beams, plinth band, lintels, chajja, shaft,
fins, roof slabs, balconies, stair cases, parapets, window wills, lofts, railing, jally, copping
or in places as shown in the drawing or as directed with 20 mm and down graded size
black hard crusher broken chips of approved quality from approved quarry including
mixing and vibro compacting to proper shape and size, level and plumbs and finishing the
exposed surfaces smooth , complete as per direction of the Engineer-in-charge including
cost of all materials and labour. M-30 Grade Concrete .
5 Providing and laying M.S. round / deformed / tor steel reinforcement bars of required
diameters for straightening, cutting to size, bending, and binding the grills, lifting and
placing in position at all heights & locations as per design complete. complete as per the
direction of the Engineer-in-charge. (linear measurement will be taken and quantity will be
calculated on standard weight of bars for all heights, which will be based on the bar
bending schedule submitted on receipt of construction drawings).
6 Providing 12 mm thick cement plaster in cement mortar (1:3) in inside and outside surface
of brick masonary finished smooth with a floating coat of neat cement on walls and bed
concrete etc. all complete and as per direction of Engineer-in-charge for all heights.
MONOBLOCK LIFT PUMP: Supplying and commissioning of mono block lift
pump(conforming to IS specification) for discharge of water.
TECHNICAL SPECIFICATION FOR RAIN WATER HARVESTING
Providing Rain water Harvesting sumps at locations as shown in the drawing, Standard
Construction Practices as per the stipulations of the Government and Authorities pertaining to
the Rain Water Harvesting Systems shall be Strictly followed and to be included in the Total
Contract , though it may not be explicitly shown in the Documents.
TECHNICAL SPECIFICATION FOR OVER HEAD TANK CUM PUMP HOUSE
294
CONTRACTOR NLUO
1
Earth work in excavation for foundation, traches, pits in all kinds of soil etc. in required width
and including disposal of excavated earth lift upto 200 mtr, disposed earth to be levelled and
neatly dressed etc. all complete.
2 Supplying and filling in plinth and excavated area with saline sand in layers not exceeding 20 cm
in depth under floors including, watering, ramming consolidating and dressing complete.
3 CEMENT CONCRETE (CAST-IN-SITU)
(i) Providing and laying of P.C.C. of 1:4:8 (1 cement : 4 coarse sand : 8 graded crusher broken
granite stone aggregate 40 mm nominal size) in foundation trenches, under floors in line level
including curing and ramming etc. all complete.
(ii) Providing and laying of P.C.C. of 1:2:4 (1 cement : 2 coarse sand : 4 graded crusher broken
granite stone aggregate 20 mm nominal size) in foundation trenches, under floors in line level
including curing and ramming etc. all complete.
4 CAST-IN-SITU R.C.C.
(i)
Providing and laying in position M-25 grade of reinforced cement concrete excluding the cost of
centring, shuttering, finishing and reinforcement-All work upto plinth level.
(ii) Providing and laying in position M-25 grade of reinforced cement concrete mixed in CICO 1 @
0.5% of cement excluding the cost of centring, shuttering, finishing and reinforcement work upto
all height.
5 FORM WORK
(i) Centring and shuttering with M.S. shutter including strutting, propping etc. and removal of form
for :
Foundations, footings, bases of columns etc. for mass concrete.
(ii) Centring and shuttering including strutting, propping etc. and removal of form for :
Shaft, columns, beams, roof slab etc. including attached pilasters, buttresses, plinth and string
courses etc.
(iii)
Centring and shuttering including strutting, propping etc. and removal of form for :
Columns, beams, lintels, roof slab etc. including attached pilasters, buttresses, plinth and string
courses etc.
295
CONTRACTOR NLUO
6 STEEL REINFORCEMENT
Providing of steel reinforcement for R.C.C. work including straightening, cutting, bending,
placing in position and binding with 18 to 20 gause binding wire at all level etc. all complete.
Tor steel
7 PILE WORK
(i) Boring, providing and installing D.M.C. piles of specified diametre and length below pile cap in
M 30 cement concrete, to carry a safe working load not less than specified, excluding the cost of
steel reinfrement but including the cost of boring with bentonite solution and the length of the
pile to be embedded in pile cap. (Length of pile for payment shall be measured upto to the
bottom of pile cap).
450 mm dia. Piles
(ii) Boring, providing and installing cast in situ single under reamed piles of specified diametre and
length below pile cap in M 20 cement concrete, to carry a safe working load not less than
specified, excluding the cost of steel reinfrement but including the cost of boring with bentonite
solution and the length of the pile to be embedded in pile cap. (Length of pile for payment shall
be measured upto to the bottom of pile cap).
300 mm dia. Piles
(iii) Extra over Item No. 7 (ii) for boring, providing and installing cast in situ double under reamed
piles, instead of single under ream of specified diameter and length. (Only the quantity of extra
bulbs are to be paid).
8 M.S. GRILL
Providing, fitting and fixing of M.S. grill as per approved design with two coats of approved
coloured enamel paint over a coat of primer etc. all complete and as per the direction of
Engineer-in-charge.
9 2.5 cm Artificial stone (A.S.) flooring with cement concrete (1:2:4) including punning using
12mm gauge hard broken granites chips including cost, convenance, taxes, T & P etc complete as
per direction of Engineer-in-charge
296
CONTRACTOR NLUO
UPVC WINDOW FRAME
10.
Providing and fixing of factory made uPVC 2-Track / 3-Track windows (White colour) made
of superior quality of uPVC materials.
Sliding 2-track frame will be multi-chambered hollow profile of size 60 mm x 60 mm with
outer wall thickness of 2mm. Duly reinforced with galvanized steel reinforcement of size with
thickness 1.2mm (+ 0.2mm). All the corners of frames and sash profiles will be fusion welded.
Sliding sash will be multi-chambered of size 35x55mm with outer wall thickness 2mm
(+0.2mm) duly reinforced with galvanized steel reinforcement of 1.2mm (+ 0.2mm) and fusion
welded at all corners.
After placing prescribed 5mm float glass in the sash, uPVC snap fed beading will be fixed.
EPDM weather sealed gasket, brush and interlock will be fitted wherever necessary. Window
will be fixed to the wall with 100mm long and 8mm dia fasteners. After fixing the window,
silicon will be affixed between the wall and the window to complete in all respects.
11. Providing, fitting and fixing of M.S.door as per approved design with two coats of approved
coloured enamel paint over a coat of primer etc. all complete and as per the direction of
Engineer-in-charge.
12 VENTILATOR :
Providing, fitting and fixing of ventilator grill shall be made out of 6 mm wire netting with 25
mm x 25 mm x 6 mm M.S. angle, which shall be finished with approved shade powder coating,
so that a layer of 15 micron can be formed in a smooth finish. The entire process shall be carried
out in hot finish in appropriate temperature to obtain the necessary finish etc. all complete and as
per the direction of Engineer-in-charge.
13 Providing, fixing of G.I. railing made with 40 mm dia G.I. pipe as per design including two coats
of approved coloured enamel paint over a coat of primer etc. all complete and as per the
direction of Engineer-in-charge.
14 Providing, fitting & fixing of one set of water level indicator consisting of copper / polythene
float guide pulleys, nylon chord and enamel coated guage calibrated to indicate depth of water in
meter or equivalent amount of water in kiloliters etc. all complete and as per the direction of
Engineer-in-charge.
297
CONTRACTOR NLUO
15 Providing, fitting & fixing of a lightening arrestor of copper shall be provided on the roof of the
tank as per IS : 2309. The top of the lightening arrestor shall be above the highest point of the
roof. The arrestor shall be suitably earthed with aluminium tape conductor etc. all complete and
as per the direction of Engineer-in-charge.
16 CEMENT PLASTER (IN COARSE SAND)
(a) Providing & applying in line level 16 mm thick cement plaster in cement mortar (1:4) smooth for
inside surface of the wall after racking out the joints including watering and curing with cost etc.
all complete and as per direction of Engineer-in-charge.
(b) 12 mm thick cement plaster two coats in cement mortar (1:4) finished smooth for exterior surface
of the walls after racking out the joints including watering and curing with cost etc. all complete
and as per direction of Engineer-in-charge.
(c) Providing 6 mm thick cement plaster in cement mortar (1:4) for ceiling including all materials,
labours, T&P etc. all complete and as per direction of Engineer-in-charge.
(d) Forming groove of uniform size from 12 x 12 mm and upto 25 x 15 mm in plastered surface as
per approved pattern using wooden battens, nailed to the under layer including removal of
wooden battens, repairs to the edges of plaster panel and finishing the groove complete as per
specifications and direction of the Engineer-in-Charge.
17 PAINTING WORKS :
(a)
Providing & applying two coats of cement paint into the outer surface of the wall including cost
of all materials etc. all complete and as per direction of Engineer-in-charge.
New work (Three or more coats)
(b) Providing and applying three coats white washing with 1st class lime including providing a
mixing neel & glue surface cleaning etc. complete.
(c) Providing & applying of synthetic enamel paint of approved brand and manufacture of required
colour to give an even shade over a coat of primer.
Two or more coats on new work over an under coat of suitable shade with ordinary paint of
approved brand and manufacture.
20 WATER PROOFING WORK FOR DOME :
(a) Providing and laying water proofing treatment inside dome etc., by applying cement slurry mixed
with Armourcrete of M/s The Structural Water Proofing Company Pvt. Ltd. or Tapecrete of M/s
CICO Engg. Service consisting of applying :
(i) First layer of slurry of cement @ 0.488 kg / sqm mixed with Armourcrete or Tapecrete @ 0.253
298
CONTRACTOR NLUO
kg / sqm. This layer will be allowed to air cure for 4 hours.
(ii) Second layer of slurry of cement @ 0.242 kg / sqm mixed with Armourcrete or Tapecrete @
0.126 kg / sqm. This layer will be allowed to air cure for 4 hours followed with water curing for
48 hours.
The rate includes preparation of surface, treatment and sealing of all joints, corners, junctions of
pipes and masonary with polymer mixed slurry.
21 Providing 12 mm thick cement plaster in cement mortar (1:3) finished smooth with a floating
coat of neat cement on walls and bed concrete etc. all complete and as per direction of Engineer-
in-charge for all heights.
22 Providing and applying a coat of epoxy paint inside surface of the walls & floors of the tank etc.
all complete and as per direction of Engineer-in-charge.
23 M.S. LADDERS :
Providing, fitting & fixing of M.S. ladders from ground level to staging height & top of staging
of the tank provided with steel ladder along with hand rails made of series of M.S. steel bars. The
steel ladders shall be study and should be fastend and anchored to the concrete by means of
anticorrosive inserts and bolts.
24 WATER PROOFING WORK FOR ROOF SLAB :
(a) Providing and laying water proofing treatment on roofs of slabs by applying cement slurry
mixed with Armourcrete of M/s The Structural Water Proofing Company Pvt. Ltd. or Tapecrete
of M/s CICO Engg. Service consisting of applying :
(i)
after surface preparation, first layer of slurry of cement @ 0.488 kg / sqm mixed with
Armourcrete or Tapecrete @ 0.253 kg / sqm.
(ii) laying second layer of fibre glass cloth manufactured by M/s The Structural Water Proofing
Company Pvt. Ltd. when the first layer is still gree. Overlaps of joints of fibre cloth should not be
less than 10 cm.
(iii)
third layer of 1.5 mm thickness consisting of slurry of cement @ 1.289 kg / sqm mixed with
Armourcrete or Tapecrete @ 0.670 kg / sqm and coarse sand @ 1.289 kg / sqm. This will be
allowed to air cure for 4 hours followed by water curing for 48 hours.
The entire treatment will be taken upto 30 cm on parapet wall and tucked into groove in parapet
all around.
299
CONTRACTOR NLUO
(b)
Providing of roof grading of screed concrete using water proofing compound in the proportion of
0.5% by weight confirming to IS : 2645 / 79 of approved brand including the cost of all
materials, labour, T&P etc. all compelte and as per direction of Engineer-in-charge.
Cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded crusher broken granite stone
aggregate 20 mm nominal size).
(c)
Providing gola 75 x 75 mm in cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 stone
aggregate 10 mm and down gauge) including finishing with cement mortar 1 : 3 (1 cement : 3
fine sand) as per standard design.
In 75 x 75 mm deep chase
25 RAIN WATER SPOUT AND PIPES
(a) Providing and fixing on wall face unplasticised PVC (working pressure 6 Kg. per sqcm) rain
water pipes confirming to IS : 4985 including jointing with seal ring conforming to IS : 5382
leaving 10 mm gap for thermal expansion.
Single socketed pipes
150 mm diameter.
(b) Providing and fixing on wall face unplasticised - PVC moulded fittings / accessories for
unplasticised - Rigid PVC rain water pipes conforming to IS : 13592 Type A including jointing
with seal ring conforming to IS : 5382 leaving 10 mm gap for thermal expansion.
(i) 150 mm bend
(ii) 150 mm shoe
(c) Providing and fixing unplasticised-PVC pipe clips of approved design to unplasticised-PVC rain
water pipes by means of 50 x 50 x 50 mm hard wood plugs, screwed with M.S. screws of
required length including cutting brick work and fixing in cement mortar 1:4 (1 cement : 4 coarse
sand) and making good the wall etc. complete.
26. Providing and laying S & S Centrifugally cast (Spun) / Ductile Iron pipes conforming to IS :
8329.
(i) 150 mm dia Ductile Iron Class K-7 pipes.
(ii) 200 mm dia Ductile Iron Class K-7 pipes.
27. Providing flanged joints to double flanged C.I. / D.I. pipes and specials including testing of
joints.
(i) 150 mm diameter pipes.
300
CONTRACTOR NLUO
(ii) 200 mm diameter pipes.
28 Providing & laying C.I. Standard specials such as tees, bends, collars tapers and caps etc.,
suitable for flanged jointing as per IS : 1538.
* Upto 300 mm dia
(i) Tees
(ii) Bends
(iii) Collars
(iv) Tapers / Reducers
(v) Caps
(vi) Flange socket
(vii) Flange pivot
29 Providing and fixing C.I. sluice valve (with cap) complete with bolts, nuts, rubber insertions etc.
all complete.
(i) 200 mm diameter (Class-II)
(ii) 150 mm diameter (Class-II)
30 Construction of brick masonry suport 600 mm x 600 mm with brick foundation, brick
superstructure, plastering, earth work excvation, P.C.C. etc. all complete.
31 Providing and fixing C.I. Scour valve (with cap) complete with bolts, nuts, rubber insertions etc.
all complete.
32 Providing and fixing C.I. Non return valve (with cap) complete with bolts, nuts, rubber insertions
etc. all complete.
33 Providing, fitting & fixing of C.I. lockable hinged type manhole covers 500 mm dia each 50 kg.
waight with frame and cover fixed at suitable places in the roof of the tank etc. all complete as
per direction of Engineer-in-charge.
301
CONTRACTOR NLUO
SEPTIC TANK
Earth work in excavation for foundation, traches, pits in all kinds of soil etc. in required width
and including disposal of excavated earth lift upto 200 mtr, disposed earth to be levelled and
neatly dressed etc. all complete.
Upto 1.5 Mtr.
Filling foundation trenches and plinths with sand, well watered, compacted, dressed and leveled
to proper gradient including cost of all materials, labour, conveyance, loading and unloading,
taxes, royalities, sundries, tools and plants, etc., complete as per the direction of the Engineer-in-
charge.
Providing and laying in position cement concrete1:3:6 (1 cement:3 fine sand:6 graded stone
aggregate 25mm nominal size) of specified grade excluding the cost of centring and shuttering.
Providing and laying in position 2.5 cm thick cement concrete1:2:4 (1 cement:2 fine sand:4
graded stone aggregate 40mm nominal size) of specified grade excluding the cost of centring and
shuttering.
K.B. brick masonry work using (250 mm x 120 mm x 80 mm) with tolerance of size K.B. bricks
having crushing strength not less than 75 kg / sqcm, mix (1 cement : 6 sands) in 250 mm thick
wall, immersing the bricks for minimum 6 hrs in water before use, with all necessary projection,
splay cutting, circular moulding, corbelling, etc., as per the direction of the Engineer-in-charge in
foundation & plinth
Providing & placing in position RCC Precast standing wall, thickness upto 100mm, in CC 1:2:4
with 12 to 6 mm graded trap aggregate including finishing the top surface smooth with trowel,
and providing lifting hooks or notches as required.
Providing lifting, hoisting and laying reinforced cement concrete to all type of concreting work to
base of columns and footing, columns, beams, plinth band, lintels, chajja, shaft, fins, roof slabs,
balconies, stair cases, parapets, window wills, lofts, railing, jally, copping or in places as shown
in the drawing or as directed with 20 mm and down graded size black hard crusher broken chips
of approved quality from approved quarry including mixing and vibro compacting to proper
shape and size, level and plumbs and finishing the exposed surfaces smooth (if required providing
plaster with cement mortar (1:4) wherever necessary complete as per direction of the Engineer-in-
charge M-30 Grade Concrete .
Providing fixing of SFRC man hole cover with frame of 450mmdia (minimum wt. 182kg) .
Providing fitting, fixing M.S.footrest complete as per direction of Engineer-in-charge.
302
CONTRACTOR NLUO
TECHNICAL SPECIFICATION FOR PARKING
Excavation of foundation trenches and column foundation and pits in all kinds of soil within an
initial lead and lift of 1.5 mtrs. depth including dressing the sides and leveling the bed and
depositing the excavated material away from the site .complete as per the direction of the Engineer-
in-charge.
Filling foundation trenches and plinths with sand, well watered, compacted, dressed and leveled to
proper gradient complete as per the direction of the Engineer-in-charge.
Providing and laying plain cement concrete (1:4:8) in foundation and bottom layers of flooring
using 40 mm size black hard crusher broken granite metal of approved quality from approved
quarry including mixing, lowering, laying and compacting to proper thickness, watering and curing
for the required period, complete as per the direction of Engineer-in-charge.
Providing and laying plain cement concrete (1:2:4) in foundation and bottom layers of flooring
using 25 mm size black hard crusher broken granite metal of approved quality from approved
quarry including mixing, lowering, laying and compacting to proper thickness, watering and curing
for the required period, complete as per the direction of Engineer-in-charge.
Providing Avg. 12 mm thick cement plaster 1:4 (1 cement : 4 sand) to inside surface of masonry,
column, beams and chajjas, racking out joints, scrapping and cleaning the surface and finishing the
plastered surface smooth to proper plumbs and levels and providing grooves as shown in the
drawing or as directed as per the direction of the Engineer-in-charge.
TECHNICAL SPECIFICATION FOR SPORTS GROUND
Excavation of foundation trenches and pits in all kinds of soil within an initial lead and lift of 1.5
mtrs. depth including dressing the sides and leveling the bed and depositing the excavated
material away from the site. complete as per the direction of the Engineer-in-charge.
Filling foundation trenches with sand, well watered, compacted, dressed and leveled to proper
gradient complete as per the direction of the Engineer-in-charge.
Providing, laying, spreading and compacting of good quality moorum in foundation trenches
with propoer thickness and well watered, compacted, dressed and leveled to proper gradient
including cost of all materials, labour, conveyance, loading and unloading, taxes, royalities,
sundries, tools and plants, etc., complete as per the direction of the Engineer-in-charge.
303
CONTRACTOR NLUO
Providing, laying, spreading and compacting of good quality stone quary dust in foundation
trenches with propoer thickness and well watered, compacted, dressed and leveled to proper
gradient, complete as per the direction of the Engineer-in-charge.
Supplying and filling foundation trenches with soil in layers not exceeding 0.3 mtr in depth
including watering and ramming and dressing and levelling the top proper level or gradient with
mechanical compaction complete as per the direction of the Engineer-in-charge.
Providing, laying, spreading and compacting of good quality moorum & sand (80% moorum &
20% sand) in foundation trenches with propoer thickness and well watered, compacted, dressed
and leveled to proper gradient. complete as per the direction of the Engineer-in-charge.
Providing, laying, spreading and compacting of red soil mixed with sand in top layer of the
running track with propoer thickness and well watered, compacted, dressed and leveled to proper
gradient, consolidation with light power road-roller including cost of all materials, labour,
conveyance, loading and unloading, taxes, royalities, sundries, tools and plants, etc., complete as
per the direction of the Engineer-in-charge.
VAT WITH PUMP HOUSE
Earth work in excavation for foundation, traches, pits in all kinds of soil etc. in required width
and including disposal of excavated earth lift upto 200 mtr, disposed earth to be levelled and
neatly dressed etc. all complete.
Upto 1.5 Mtr.
Excavation of foundation trenches and column foundation and pits in all kinds of soil within an
initial lead and lift of exceeding 1.5 mtrs. but upto 3.00 mtr. depth including dressing the sides
and leveling the bed and depositing the excavated material away from the site within an initial
lead of 50 mtrs including cost of all labour, sundries, tools and plant etc., complete as per the
direction of the Engineer-in-charge. The rate includes dewatering of the excavated pit if any
water seepage found during execution of all such related works.
Back filling in plint, in embankments, around footings, pits, trenches, foundation etc. in layers
not exceeding 200 mm thickness, including watering, compacting by rammingl / rolling,
levelling to specified slopes, dressing and consolidation etc. complete as per specification and
as directed (payment shall be made based on certified excavation quantity less volume
occupied by structures) and theoritical completed quantity as measured from drawings.
With selected earth available from excavation areas nearby.
304
CONTRACTOR NLUO
Filling foundation trenches and plinths with sand, well watered, compacted, dressed and
leveled to proper gradient including cost of all materials, labour, conveyance, loading and
unloading, taxes, royalities, sundries, tools and plants, etc., complete as per the direction of the
Engineer-in-charge.
Providing and laying of P.C.C. of 1:4:8 (1 cement : 4 coarse sand : 8 graded crusher broken
granite stone aggregate 40 mm nominal size) in foundation trenches, under floors in line level
including curing and ramming etc. all complete including cost, convenance, taxes, T & P etc
complete as per requirement and direction of Engineer-in-charge.
Providing and laying water proofing treatment to internal surfaces of the VAT of the following
operation.
R.C.C. surface to be cleared of all dirt, loose material and kept dry and holes / cracks to be
repaired with cement putty using bonding agent of approved manufactures. The prepared
surface shall be coated with two coats of acrylic polymer modified cementatious (PMC) slurry
coating upto the finished floor level. The second coat shall be applied after the first coat has
dired.
Applying one coat ofacrylic polymer modified cement brush topping over PMC slurry coating
after the last PMC slurry coat has dried.
Providing a protective layer over the treated surface by laying 20 mm thick cement plaster 1 : 4
(1 cement : 4 coarse sand) mixed with approved water proofing compound when the treatment
sets dry.
Providing average 25 mm thick grading plaster with mix 1:2:4 (1 cement : 2 sand : 4 bazuri) of
cement mortar using 2% water proofing compound (of cement) of approved make (pedilite,
sika or equivalent) and quality on top of roof terrace of all floors including scrapping and
cleaning the roof plastering and finishing smooth to proper slope and gradient, including cost
of all materials, labour, conveyance, loading and unloading, taxes, royalties, scaffolding,
watering.
305
CONTRACTOR NLUO
Providing and laying in position machine batched, machine mixed and machine vibrated
nominal mix cement concrete of specified grade for reinforced cement concrete structural
elements including the cost of centering, shuttering, finishing and admixtues in recommended
proportions (as per IS: 9103) to accalerate, retard setting of concrete improve workability
without impairing strength and durability as per directions of Project Director/Architect. but
excluding the cost of reinforcement M-25 grade reinforced cement concrete.
Providing 12 mm thick cement plaster in cement mortar (1:3 ) in inside and outside surface of
brick masonary finished smooth with a floating coat of neat cement on walls and bed concrete
etc. all complete and as per direction of Engineer-in-charge for all heights.
Providing & applying in line level 16 mm thick cement plaster in cement mortar (1:6) smooth
for inside surface of the wall after racking out the joints including watering and curing with
cost etc. all complete and as per direction of Engineer-in-charge.
Providing and laying M.S. round / deformed / tor steel reinforcement bars of required
diameters for straightening, cutting to size, bending, and binding the grills, lifting and placing
in position at all heights & locations as per design complete including cost of bars, cost of
binding wires 22 gauge, labour, conveyance, loading and unloading, taxes, royalties,
sundries, tools and plants, etc. complete as per the direction of the Engineer-in-charge. (linear
measurement will be taken and quantity will be calculated on standard weight of bars for all
heights, which will be based on the bar bending schedule submitted on receipt of construction
drawings).
Providing strong, rigid, leveled, and plumbed centering and shuttering to required shape and
size, with wooden or steel centering materials with all necessary bracing and tiles and supports
with leveling centering covered with bituminous paper with provisions necessary holes and
pockets for electrical conduits, pipes, P.H. pipes, for hooks or boxes, switch and board insert
plates, clamps and extension bars etc., including dismantling the same after the required
intervals from the date of casting including cost of all materials, labour, conveyance, loading
and unloading, taxes, royalties, scaffolding, sundries, tools and plants, etc., complete as per the
direction of the Engineer-in-charge in columns, beams, lintel, sill, copping, roof slab, stair,
chajja, shelf, loft, fin, pillaster, landing, balconies, projections etc. for all type of works and
thickness in Foundation, Plinth and Superstructure.
Supplying, fabricating and fixing MS grills madeup with M.S. square bar / round bar / flat /
angle as per design and drawing including applying two coat enamel paint over a coat of red
oxide primer and fixing the same for door ,window and ladder frames including cost,
convenance, taxes, T & P etc complete as per requirement and direction of Engineer-in-charge.
306
CONTRACTOR NLUO
Providing and fixing in position precast R.C.C.manhole cover and frame of 600mm x 450mm
internal dimension of required shape and approved quality.
K.B. brick masonry work using (250 mm x 120 mm x 80 mm) with tolerance of size K.B.
bricks having crushing strength not less than 75 kg / sqcm, mix (1 cement : 6 sands) in 250 mm
thick wall, immersing the bricks for minimum 6 hrs in water before use, with all necessary
projection, splay cutting, circular moulding, corbelling, etc., including cost of all materials,
labour, conveyance, loading and unloading, taxes, royalties, scaffolding, watering, curing,
sundries, tools and plants etc. upto floor five level, as per the direction of the Engineer-in-
charge in superstructure.
2.5 cm Artificial stone (A.S.) flooring with cement concrete (1:2:4) including punning using
12mm gauge hard broken granites chips including cost, convenance, taxes, T & P etc complete
as per direction of Engineer-in-charge
Providing and applying 2 coats acrylic based weather coat paint (exterior quality) over a coat
of primer of approved brand & shade over the surfaces including preparation of surface, with
cost of all materials, labour, conveyance, taxes, royalties, scaffolding, watering, curing,
sundries, tools and plants, etc., as per the direction of the Engineer-in-charge.
Providing & applying two coats of cement paint into the outer surface of the wall including
cost of all materials etc. all complete and as per direction of Engineer-in-charge.
New work (Three or more coats)
Distempering two coats to wall with distemper of approved shade on new work to give an even
shade including cost of distemper.
Providing and fixing M.S. footrest with 20x20x10cm cement concrete blocks 1:3:6(1 cement:3
coarse sand:6 graded stone aggregate 20mm nominal size) as per standard design.
307
CONTRACTOR NLUO
FIRE FIGHTING U.G.SUMP AND PUMP HOUSE
Earth work in excavation for foundation, traches, pits in all kinds of soil etc. in required width
and including disposal of excavated earth lift upto 200 mtr, disposed earth to be levelled and
neatly dressed etc. all complete.
Upto 1.5 Mtr. And above
Back filling in plint, in embankments, around footings, pits, trenches, foundation etc. in layers
not exceeding 200 mm thickness, including watering, compacting by rammingl / rolling,
levelling to specified slopes, dressing and consolidation etc. complete as per specification and
as directed (payment shall be made based on certified excavation quantity less volume
occupied by structures) and theoritical completed quantity as measured from drawings.
With selected earth available from excavation areas nearby.
Providing and laying of P.C.C. of 1:4:8 (1 cement : 4 coarse sand : 8 graded crusher broken
granite stone aggregate 40 mm nominal size) in foundation trenches, under floors in line level
including curing and ramming etc. all complete including cost, convenance, taxes, T & P etc
complete as per requirement and direction of Engineer-in-charge.
Providing and laying water proofing treatment to inside surfaces of the U.G. Sump of the
following operation.
R.C.C. surface to be cleared of all dirt, loose material and kept dry and holes / cracks to be
repaired with cement putty using bonding agent of approved manufactures. The prepared
surface shall be coated with two coats of acrylic polymer modified cementatious (PMC) slurry
coating upto the finished floor level. The second coat shall be applied after the first coat has
dired.
Applying one coat ofacrylic polymer modified cement brush topping over PMC slurry coating
after the last PMC slurry coat has dried.
308
CONTRACTOR NLUO
Providing a protective layer over the treated surface by laying 20 mm thick cement plaster 1 : 4
(1 cement : 4 coarse sand) mixed with approved water proofing compound when the treatment
sets dry.
Providing average 25 mm thick grading plaster with mix 1:2:4 (1 cement : 2 sand : 4 bazuri) of
cement mortar using 2% water proofing compound (of cement) of approved make (pedilite,
sika or equivalent) and quality on top of roof terrace of all floors including scrapping and
cleaning the roof plastering and finishing smooth to proper slope and gradient, including cost
of all materials, labour, conveyance, loading and unloading, taxes, royalties, scaffolding,
watering.
Providing and laying in position machine batched, machine mixed and machine vibrated
nominal mix cement concrete of specified grade for reinforced cement concrete structural
elements including the cost of centering, shuttering, finishing and admixtues in recommended
proportions (as per IS: 9103) to accalerate, retard setting of concrete improve workability
without impairing strength and durability as per directions of Project Director/Architect. but
excluding the cost of reinforcement M-25 grade reinforced cement concrete.
Providing, fitting and fixing of M.S.door as per approved design with two coats of approved
coloured enamel paint over a coat of primer etc. all complete and as per the direction of
Engineer-in-charge.
Providing and fixing of factory made uPVC 2-Track / 3-Track windows (White colour) made
of superior quality of uPVC materials.
Sliding 2-track frame will be multi-chambered hollow profile of size 60 mm x 60 mm with
outer wall thickness of 2mm. Duly reinforced with galvanized steel reinforcement of size with
thickness 1.2mm (+ 0.2mm). All the corners of frames and sash profiles will be fusion welded.
Sliding sash will be multi-chambered of size 35x55mm with outer wall thickness 2mm
(+0.2mm) duly reinforced with galvanized steel reinforcement of 1.2mm (+ 0.2mm) and fusion
welded at all corners.
After placing prescribed 5mm float glass in the sash, uPVC snap fed beading will be fixed.
EPDM weather sealed gasket, brush and interlock will be fitted wherever necessary. Window
will be fixed to the wall with 100mm long and 8mm dia fasteners. After fixing the window,
silicon will be affixed between the wall and the window to complete in all respects.
Providing 12 mm thick cement plaster in cement mortar (1:3 ) in inside surface of brick
masonary finished smooth with a floating coat of neat cement on walls and bed concrete etc.
all complete and as per direction of Engineer-in-charge for all heights.
Providing 12 mm thick cement plaster in cement mortar (1:6 ) in inside surface of brick
masonary finished smooth with a floating coat of neat cement on walls and bed concrete etc.
all complete and as per direction of Engineer-in-charge for all heights.
Providing & applying in line level 15 mm thick cement plaster in cement mortar (1:6) smooth
for outside surface of the wall after racking out the joints including watering and curing with
309
CONTRACTOR NLUO
cost etc. all complete and as per direction of Engineer-in-charge.
Providing and laying M.S. round / deformed / tor steel reinforcement bars of required
diameters for straightening, cutting to size, bending, and binding the grills, lifting and placing
in position at all heights & locations as per design complete including cost of bars, cost of
binding wires 22 gauge, labour, conveyance, loading and unloading, taxes, royalties,
sundries, tools and plants, etc. complete as per the direction of the Engineer-in-charge. (linear
measurement will be taken and quantity will be calculated on standard weight of bars for all
heights, which will be based on the bar bending schedule submitted on receipt of construction
drawings).
Providing strong, rigid, leveled, and plumbed centering and shuttering to required shape and
size, with wooden or steel centering materials with all necessary bracing and tiles and supports
with leveling centering covered with bituminous paper with provisions necessary holes and
pockets for electrical conduits, pipes, P.H. pipes, for hooks or boxes, switch and board insert
plates, clamps and extension bars etc., including dismantling the same after the required
intervals from the date of casting including cost of all materials, labour, conveyance, loading
and unloading, taxes, royalties, scaffolding, sundries, tools and plants, etc., complete as per the
direction of the Engineer-in-charge in columns, beams, lintel, sill, copping, roof slab, stair,
chajja, shelf, loft, fin, pillaster, landing, balconies, projections etc. for all type of works and
thickness in Foundation, Plinth and Superstructure.
Supplying, fabricating and fixing MS grills madeup with M.S. square bar / round bar / flat /
angle as per design and drawing including applying two coat enamel paint over a coat of red
oxide primer and fixing the same for door ,window and ladder frames including cost,
convenance, taxes, T & P etc complete as per requirement and direction of Engineer-in-charge.
Providing and fixing in position precast R.C.C.manhole cover and frame of 600mm x 450mm
internal dimension of required shape and approved quality.
K.B. brick masonry work using (250 mm x 120 mm x 80 mm) with tolerance of size K.B.
bricks having crushing strength not less than 75 kg / sqcm, mix (1 cement : 6 sands) in 250 mm
thick wall, immersing the bricks for minimum 6 hrs in water before use, with all necessary
projection, splay cutting, circular moulding, corbelling, etc., including cost of all materials,
labour, conveyance, loading and unloading, taxes, royalties, scaffolding, watering, curing,
sundries, tools and plants etc. upto floor five level, as per the direction of the Engineer-in-
charge in foundation,plinth and superstructure.
2.5 cm Artificial stone (A.S.) flooring with cement concrete (1:2:4) including punning using
12mm gauge hard broken granites chips including cost, convenance, taxes, T & P etc complete
as per direction of Engineer-in-charge
Providing & applying two coats of cement paint into the outer surface of the wall including
cost of all materials etc. all complete and as per direction of Engineer-in-charge.
310
CONTRACTOR NLUO
New work (Three or more coats)
Distempering two coats to wall with distemper of approved shade on new work to give an even
shade including cost of distemper.
TECHNICAL SPECIFICATION FOR FIRE FIGHTING SYSTEM
Supply, Erection, testing & commissioning of Electrical Motor driven main pump of
horizontal centrifugal split casing type with gland packing and capable to deliver 2280
lpm at an head of 70 mh and complete set shall mounted on common base frame. The
1
quoted rate includes providing & fixing of, Water re-circulation arrangement,
coupling, coupling gaurd, air release valve & RCC foundation ( as recommended by
manufacturer) and Foundation bolts etc.
Supply, Erection, Testing and Commissioning of Diesel engine driven main fire
hydrant pump horizontal mounted centrifugal multistage pump located at basement
floor level, capable of delivering 2280 lpm at an head of 70 mh with suitable HP for
automatic operation, mounted on a common base frame including pressure gauge,
2
pressure switch, suitable diesel tank of 200 litres storage capacity and coupled to
diesel engine. It shall be fitted on a common base frame with antivibrating pads
including all other auxiliaries such as cooling system etc., complete (Foundation
required for pump will be done civil contractor).
Supply, Erection, testing and commissioning of Jockey pump located at basement
3 floor level, capable of delivering 180 lpm at an head of 70 mh with adequate HP,
electrical driven centrifugal type pump with pressure switch etc., complete.
Supply, Erection, testing and commissioning of Terrace pump located at Terrace,
capable of delivering 900 lpm at an head of 35 mh with 2900 rpm with adequate HP,
4
electrical driven centrifugal type pump with pressure gauge, pressure switch, etc.,
complete.
Fabricating & Supply, installing, testing and commissioning of compartmentalized
5 Common Control panel for Electrical motor driven pumps and Diesel engine driven
pumps for Wet riser system
Fabricating & Supply, installing, testing and commissioning of compartmentalized
6 Common Control panel for Electrical motor driven pumps and Diesel engine driven
pumps for Down Comer system
Fabricating & Supply, installing, testing and commissioning of compartmentalized
7
Control panel for Electrical Terence Pump Down Comer system
Supplying, laying, testing & commissioning of FRLS,PVC outer sheathed, steel
armoured, copper conductor, 1100v grade power cables with glands etc.The cables
8
shall be laid in tray / on walls/ floor etc. as required. The minimum size of the cables
shall as mentioned below.
8A 3.5C x 50 sq.mm for main pumps
8B 4 C x 16 Sqmm. Jockey pumps
8C 12 C x 2.5 Sqmm.Diesel engines
311
CONTRACTOR NLUO
8D 3.5C x 16 sq.mm for main pumps
8E 2 C x 2.5 Sqmm.for Instrumentation
Supplying and fixing of perforated G.I.sheet Cable Tray with necessary angle iron
9 suspension supports, anchor fasteners etc. complete. Maximum height of suspension
shall not exceed 500 mm ( 150 x 50 x 1.6 )
Supplying and fixing of perforated G.I.sheet Cable Tray with necessary angle iron
10 suspension supports, anchor fasteners etc. complete. Maximum height of suspension
shall not exceed 500 mm ( 75 x 75 x 1 )
G.I. Earthing strips of 25mm x 6mm thick, strip shall be run on floor / ceiling / walls,
11 from the equipment to the nearest Earth pit with necessary accessories as required. (
Erath pit shall be executed by other agencies).
Supply, Erection, Testing and commissioning of C.I. Gate valves as per IS:14846 (
12 PN 16 Rating, for suction side of the pumps) with flanges, bolts, nuts, washers,
gaskets etc.
13A 200 mm dia
13B 150 mm dia
13C 100 mm dia
Supplying, installing and commissioning C.I.flanged "Y" type Strainer with SS
14
mesh, suitable flanges, nuts, bolts, gaskets etc. complete.
14A 200 mm dia
14B 150 mm dia
14C 100 mm dia
Supplying, installing and commissioning C.I.flanged Foot Valve with SS mesh,
15
suitable flanges, nuts, bolts, gaskets etc. complete.
15A 150 mm dia
15B 100 mm dia
Supplying, installing and commissioning Priming Tank of 500 ltrs capacity with all
16
accessories as required
Supplying, Installing, testing and commissioning CI Lever Operated Butterfly valves
17
as per BS 5155 ( PN 16) with required flanges, nuts, bolts etc. complete.
17A 150 mm dia
17B 100 mm dia
17C 80 mm dia
17D 50 mm dia
Supplying, installing, testing and commissioning of C.I. Slim Seal Type Non-return
18 valves as per IS:5312( PN 16) with required flanges, nuts, bolts and gaskets etc.
complete.
18A 150 mm dia
18B 100 mm dia
18C 50 mm dia
Supplying, installing, testing and commissioning of 15 mm dia GM chrome finished
19
Ball valves with fittings of screwed end type.
312
CONTRACTOR NLUO
Supply and installation of Pressure switches of suitable range for pump sets with
20
Fittings like unions / colors / reducers etc.
Supply and installation of Pressure gauges of suitable range for pump sets, siphon,
21
Fittings like unions / colors / reducers etc.
Supplying, installing, testing and commissioning of G I / M.S. Pipes confirming to IS
3589, 6mm thick and IS 1239 part - 1, heavy grade, with painting, suitable type of
supports, anchor fasteners, bolts nuts, clamps, "U" bolts, malleable specials such as
22 Reducers,Tees, elbows, flanges. Including cutting, Welding, fixing in / on walls,
ceiling by using suitable supports etc, as per drawings. The quoted rate shall also
include for chasing / chipping walls, making bore holes in brick walls and making
them good with filler material and finished in cement mortar etc. complete.
22A 200 mm dia ( GI )
22B 150 mm dia ( GI )
22C 100 mm dia ( GI )
22D 80 mm dia ( GI )
22E 50 mm dia ( GI )
22F 25 mm dia ( GI )
100 mm dia ( MS ) for Exhaust with Mineral wool insulation, aluminium clading &
23
Structural Support
Supply & erection of Structural Supports including MS Angles & Channels of
24 suitable size along with pipe supporting accessories like U-bolt,Threaded rod etc
complete (kg)
B. FIRE HYDRANT & SPRINKLER SYSTEM
Supplying, installing, testing and commissioning of G I / M.S. Pipes confirming to IS
3589, 6mm thick and IS 1239 part - 1, heavy grade, with painting, suitable type of
supports, anchor fasteners, bolts nuts, clamps, "U" bolts, malleable specials such as
25 Reducers,Tees, elbows, flanges. Including cutting, Welding, fixing in / on walls,
ceiling by using suitable supports etc, as per drawings. The quoted rate shall also
include for chasing / chipping walls, making bore holes in brick walls and making
them good with filler material and finished in cement mortar etc. complete.
25A 150 mm dia ( GI )
25B 100 mm dia ( GI )
25C 80 mm dia ( GI )
25D 65 mm dia (GI)
25E 50 mm dia ( GI )
26F 40 mm dia ( GI )
26G 32 mm dia ( GI )
26H 25 mm dia ( GI )
313
CONTRACTOR NLUO
Supplying, installing, testing and commissioning of G.I. Pipes confirming to IS 1239
Pt - I Heavy grade with suitable type of supports, malleable specials such as
Reducers, Tees, elbows, flanges. Including cutting, Welding. The rate quoted includes
anticorrosive treatment with 4 mm thick polymer corrosion resistant tape as per IS
10221, overlap shall be 15mm minimum and radiographic testing for 10 % of the
27
field joints ( under ground).The quated rate shall include of Acrylic Firestop Sealant
in the opening for pipes passing through fire compartment walls of RCC floors,
masonry walls to provide up to 2 hours fire rating For support details refer tender
drawings and same shall be included in the quoted rates. The under ground pipe
routing shall be marked with the suitalbe type of indicators on the ground level
27A 150 mm dia ( GI )
27B 100 mm dia ( GI )
Supply and installation of RCC hume pipes of 300 mm dia & NP 2 Class with collars
for road / below floor crossing of Fire water pipes. The rate shall includes excavation,
28
PCC bed and ends shall be closed with Brick masonry work as directed by site
engineer.
Double headed Yard hydrant valve as per IS 5290, made of gunmetal with 63 mm
dia instantaneous outlet of 80 mm dia fanged inlet ,Gun metal Blank caps , chain and
29
hand wheels etc complete.with Orifice plate(SS304 6MM THK) as required to
minimise the pressure at discharge point.
RRL - TYPE -A hose 15m long with instantaneous couplings and Hoses shall be
30
stored in side the hose cabinet.
31 1 no. Gun metal Short Branch pipe with nozzle.
Hose reel drum of swinging type with 19mm dia Rubber braided hose of 36.5 M.
32
length with Ball valve and Shut off nozzle, complete.
Supplying, installing, testing and commissioning of 25 mm dia GM chrome finished
33
Ball valves with fittings of screwed end type.
Fire duct Shutter fabricated out of M.S. sheet of 16 swg. Door shall be 900mm x 1200
mm x 150mm (However size may vary as per site conditions) & fixed with 4 mm
34 thick Glass, suitable Rubber beedibg and Locking arrangement. Quoted rate shall be
includes all fasteners etc, and complete shutter shall be enamel painted of approved
colour both inside and out side.
Fire Duct Closing at all floor levels with 4 mm thick Checker plates and all other
35
accessories
Supplying, installing and commissioning of 4 Way Fire brigade inlet inlet connection
in Gun metal Non- return valves instantaneous coupling type arranged on 150 mm dia.
Pipe manifold and connected to wet riser main as well as to Fire water tank. Quoted
36
rate shall be included with C.I. Butterfly valve, C.I. Non-return valve and M.S. cabinet
of suitable size with mounting supports etc. complete with RCC foundation Under
ground
314
CONTRACTOR NLUO
Supplying, installing and commissioning of 2 Way Fire brigade inlet inlet connection
in Gun metal Non- return valves instantaneous coupling type arranged on 150 mm dia.
Pipe manifold and connected to wet riser main as well as to Fire water tank. Quoted
37
rate shall be included with C.I. Butterfly valve, C.I. Non-return valve and M.S. cabinet
of suitable size with mounting supports etc. complete with RCC foundation Under
ground
Supplying, Installing, testing and commissioning CI Butterfly valves as per BS 5155
38
( PN 16) with required flanges, nuts, bolts etc. complete.
38A 150 mm dia
38B 50 mm dia
Supplying, installing, testing and commissioning of C.I. Non-return valves as per
39
IS:5312( PN 16) with required flanges, nuts, bolts and gaskets etc. complete.
39A 150 mm dia
Supplying, installing, testing and commissioning Pendent Type Sprinkler quartzoid
40 bulb type with 15mm screwed end connection of 68 deg. C. temperature rating.
Sprinklers shall be UL Listed.
Supplying, installing, testing and commissioning of hydraulically operated Sprinkler
control valve, with water motor gong bell and trims as required, pressure gauges,
41
drain valves, ball valves, check valves, strainers etc. complete. Alarm valve shall be
UL Listed / FM approved.
Supplying, installing, testing and commissioning Sprinkler Annunciation Panel with
42
16 window capacity
Supplying and fixing approved make 25mm dia. automatic Air Release valve with
43
unions etc. complete.
Supply & erection of Structural Supports including MS Angles & Channels of
44 suitable size along with pipe supporting accessories like U-bolt,Threaded rod etc
complete (kg)
Supplying, installing, testing and commissioning Flow switch on sprinkler
45 distribution header on each floor nd shall be connected to fire alarm panel through
cable. Cable shall be measured seperately.
Excavation of trenches up to 1.5 mts. in depth, for laying pipes upto 150mm dia.
Including forming bottom surface to required level, refilling the trenches with selected
excavated earth around the pipe in layers of 150mm thick, watering, consolidating.
46
Quoted price inclusive of disposing off / Carting away the surplus earth out side the
site to a dump yard acceptable local bodies or as directed by the site engineer with a
lead of 300 mts. etc. complete.
46A In all kinds of Soil
Cutting of Rock
315
CONTRACTOR NLUO
C. FIRE EXTINGUISHERS
Supply & Fixing of Ceasefire's 5 Kg capacity Stored Pressure fire extinguisher
containing MAP 90 Powder, fitted with Pressure Guage. The Extinguisher comes
with Controllable discharge Mechanism, range of 4 mtrs, and applicable on Class
47
A,B,C & electrically started fires, with an A Rating of 55A, & B Rating of 55B.
Helium Leak Detection tested with Certificate, ISI & EN Approved with 5 Years
Warranty
Supply & Fixing of Ceasefire's 9 lt capacity Fire Extinguisher containing Water with
a Gross Wt of 14.6 Kg stored pressure type with controllable discharge mechanism,
Pressure Guage range of 6 mtrs and applicable on all classes A Fires, Deep drawn
48
cylinder with 2.0mm thickness and MIG welded with Forged and Machined Valve
construction, cylinder epoxy powder coated inside and Epoxy Polyster powder coated
outside, Helium Leak detection tested, ISI & EN approved with 1 Year Warranty
Supply & Fixing of Ceasefire's 4.5 Kg capacity Stored Pressure fire extinguisher
containing Carbob Di Oxide, Trolley Mounted with Used Unused Mechanism,
49
Squeeze Grip Type Discharge for controllable discharge mechanism, Gross Wt 19.1
Kg, Class B rating of 55B, ISI approved and 1 Years Warranty
Supply & Fixing of Ceasefire's 9 lt capacity Fire Extinguisher containing AFFF
mechanical foam with a Gross Wt of 14.6 Kg stored pressure type with controllable
discharge mechanism, Pressure Guage range of 6 mtrs and applicable on all classes
50 A,B Fires, Deep drawn cylinder with 2.0mm thickness and MIG welded with Forged
and Machined Valve construction, cylinder epoxy powder coated inside and Epoxy
Polyster powder coated outside, Helium Leak detection tested, ISI & EN approved
with 1 Year Warranty
D. FIRE ALARM SYSTEM
SITC of Ceasefire's 2 Loop Analogue Addressable Main Fire Alarm Control Panel
with 2 LDC with PSU, Housing with Battery Backup for 48 hrs, advanced 240
charecter Graphical LCD user interface display with 100 fire zoners, capable of
51
addressing 254 devices in a single loop, with optional Onboard printer, dedicated
RS232 serial port for PC or Modem conenction, Networkable upto 200 nodes and
approved by BSI to EN54 & LPCB - CF-FIRELINE 2 ( 2 LDC )
SITC of Ceasefire's 4 Loop Analogue Addressable Main Fire Alarm Control Panel
with 4 LDC with PSU, Housing with Battery Backup for 48 hrs, advanced 240
charecter Graphical LCD user interface display with 100 fire zoners, capable of
52
addressing 254 devices in a single loop, with optional Onboard printer, dedicated
RS232 serial port for PC or Modem conenction, Networkable upto 200 nodes and
approved by BSI to EN54 & LPCB - CF-FIRELINE 4 ( 4 LDC )
SITC of Addressable Photoelectric Smoke Sensor with compatible base with
Removable High Perf Chamber Technology with twin LED for 360 degree viewing,
53
Variable Sensitivity, electronically addressed and approved by LPCB - CF-ALK - E +
YBN-R/3
316
CONTRACTOR NLUO
SITC of Addressable Manual Call Point with non Frangible element with Plug in
wiring Terminals, fast response, Status LED and approved by LPCB - CF-HCP-E
SITC of Adderssable Loop powered Wall Sounder with base providing 8 volume
levels and 51 tones with max output of 102 b B with low current consumption and
54
addressed via handhelp programmer and approved by LPCB - CF- CHQ-WS2 +
YBO-R/3
SITC of Conventional Beam Smoke Detector that consists of an emitter and receiver
that cover a distance of 5 - 100m providing 2 a maximum coverage of 1500m,
Automatic compensation Automatic signal strength adjustment Emitter unit can be
55
powered direct from zone (for loop). Can be interfaced onto ESP system via CF-CHQ-
DZM or CF-CHQ-SZM Features a Latching or Non-Latching Fault Relay Approved
by LPCB. CF-SPC-ET
SITC of Powered Output Module designed to supply a nominal 24Vd.c. at various,
userselectable
current levels from 2 to 32mA (in increments of 2mA. Includes two monitored inputs),
56
Small design, provides simple connectivity to ESP loop for third-party devices,
Colour-coded flying leads for simple installation, Approved by LPCB. CF-CHQ-
POM
SITC of Single Zone Monitor designed to allow up to 6 conventional detectors or
CF-SPC-ET/CF-SRA-ET beam detectors to be interfaced to Ceasefire‟s ESP
57
Analogue Addressable system, Loop Powered, Fully monitored for Short and Open
Circuit faults, DIN Rail version available, Approved by LPCB. CF-CHQ-SZM
SITC of Short Circuit Isolator Base, which detects short circuits on loop.The unit
58 incorporates an amber LED to show when it is isolating a section of the loop.Quick
connection via square cable clamps. LPCB approved. - CF - YBO - R/SCI
Supply, Installation, Testing & Commissioning of Microprocessor based Conventional
59 16 Zone Main Fire Alarm Control Panel with LCD display, fully programmable &
compatible with conventional devices
Supply, Installation, Testing & Commissioing of 4 Zone Micro Processor based
Conventional Fire Alarm Panel fully compliant with BS EN54-2 & 4, 2 wire
60 Repeaters and ancillary boards, Fully Programmable, Compatible with a maximum of
32 detection devices per zone, with 2 sounder outputs, 3 Amp Power supply. EN,
LPCB & Vds approved. Product Code: CF-HFP-CP4
Supply, Installation, testing & commissioning of Conventional Manual Call Point with
61 non Frangible element conforms to EN54, approved by LPCB with Back Box.
Product Code: CF-CCP-E
Supply, Installation, testing a& Commissioning of Conventional Electronic Sounder,
with max output of 112 d B with low current consumption ( 12 m A ) with 32 user
62
selectable tones, and in IP Rating of IP45 and approved by LPCB. With deep base.
Product Code: CF-Banshee
Supply & Laying of 2C x 1.5 sqmm PVC insulated Copper armoured cable with all
63
accessories as required
317
CONTRACTOR NLUO
E. ESCAPE SIGNAGES
Supply & Fixing of Signage with printed "IN CASE OF FIRE, DO NOT USE
ELEVATOR" of 1.5cm height letters in red with white back ground.The size of the
64
board shall be 12" x 12" cm and shall be fixed at the height of 2 mts. from finished
floor near Manual call points.
Supply & Fixing of Floor indentification signage ( ie, GROUND FLOOR …etc.) at
65 each stair enclosure on every floor, indicating the floor number in words, lettering size
shall be 7.5 cm with contrasting colour from back ground.Size shall be 15cm x 60cm.
Supply and fixing in position the signages " FIRE ORDER" it should contain the
66 following matter on 3mm thick "Opaque" PVC foam board of computerised cut, PVC
non-reflective self adhesive vinyle painted foam board of 3' x 4'.
Supply and fixing in position Fire Extinguisher Locator signages 5" x 5",
67
photoluminescent type
Supply and fixing in position Fire Exit Board signages 15cmx30cm, photoluminescent
68
type
Fire Extinguishers & Escape Signage for Additional Building
Supply & Fixing of Ceasefire's 5 Kg capacity Stored Pressure fire extinguisher
containing MAP 90 Powder, fitted with Pressure Guage. The Extinguisher comes with
69 Controllable discharge Mechanism, range of 4 mtrs, and applicable on Class A,B,C &
electrically started fires, with an A Rating of 55A, & B Rating of 55B. Helium Leak
Detection tested with Certificate, ISI & EN Approved with 5 Years Warranty
Supply & Fixing of Ceasefire's 9 lt capacity Fire Extinguisher containing Water with a
Gross Wt of 14.6 Kg stored pressure type with controllable discharge mechanism,
Pressure Guage range of 6 mtrs and applicable on all classes A Fires, Deep drawn
70
cylinder with 2.0mm thickness and MIG welded with Forged and Machined Valve
construction, cylinder epoxy powder coated inside and Epoxy Polyster powder coated
outside, Helium Leak detection tested, ISI & EN approved with 1 Year Warranty
Supply & Fixing of Ceasefire's 4.5 Kg capacity Stored Pressure fire extinguisher
containing Carbob Di Oxide, Trolley Mounted with Used Unused Mechanism, Squeeze
71
Grip Type Discharge for controllable discharge mechanism, Gross Wt 19.1 Kg, Class B
rating of 55B, ISI approved and 1 Years Warranty
Supply and fixing in position Fire Extinguisher Locator signages 5" x 5",
72
photoluminescent type
Supply and fixing in position Fire Exit Board signages 15cmx30cm, photoluminescent
73
type
318
CONTRACTOR NLUO
MODEL RULES FOR THE PROTECTION OF HEALTH AND
SANITARY ARRANGEMENTS OR WORKERS
1.0 APPLICATION:
These rules shall apply to all Construction of National Law University Campus Works in charge
of the Proposed University Campus at Naraj, Cuttack for National Law University ORISSA .
2.0 DEFINITION:
a. Work place means a place at which, at an average 50 workers are employed in connection
with construction work.
b. Large work place means a place at which an average 500 or more workers are employed in
connection with the construction work.
3.0 FIRST AID.
a. At every work place, there shall be maintained in readily accessible place first aid
appliance including an adequate supply of sterilized dressings and sterilized cotton
wool. The appliance shall be kept in good order and in large work place they shall be
placed under the charge of a responsible a person who shall be readily available
during working hours.
b. At large work place, where hospital facilities are not available within easy distance of
the works, first aid posts shall be established and run by trained compound.
c. Where large work place are remote from regular hospitals an indoor ward shall be
provided with one bed for every 250 employees.
d. Where large work place are situated in cities, towns in their suburbs and no beds are
considered necessary owing to the proximity of city or town hospitals, suitable
transport shall be provided to facility removal of urgent cases to the hospitals. At
other works places, some conveyance facilities such as a car, shall be kept readily
available to take inquired person or persons suddenly taken to the nearest hospital.
4.0 DRINKING WATER :
a. In every place there shall be provided & maintained at suitable places easily
accessible to labour, sufficient supply of cold water fit for drinking.
b. where drinking water is obtained from an intermittent public water supply, which
work place shall be provided with storage where such drinking water shall be stored.
c. Every water supply of storage shall be at a distance of not less than 15m from any
latrine, drain or other source of pollution. Where water has to be drawn from an
existing well which is within the proximity of latrine, drain or any other source of
pollution, the well shall be properly chlorinated before water is drawn from it for
319
CONTRACTOR NLUO
drinking . All such wells shall be entirely closed in and be provided with trap door
which shall be dust and water proof.
d. A reliable pump shall be fitted to each covered well, the trap door shall be kept
locked and opened only for cleaning or inspection which shall be done at least once a
month
5.0 WASHING AND BATH PLACES.
a. Adequate washing and bathing places shall be provided separately for men and
women.
b. Such places shall be kept in clean & drained condition.
6.0 SCALE OF ACCOMODATIONIN LATRINES AND URINALS.
There shall be provided within the precincts of every work place latrines and urinals and an
accessible place, and the accommodation, separately for each of them shall not be less than
the following scale :
No of Seats.
a. Where the number of persons does not exceed 50 2
b. Where the number of persons does exceed 3
50 but dose not exceed 100
c. For every additional 10 3 per 100
In particular case the Engineer who have the power to vary the scale where necessary.
7.0 LARTINES AND URINALS FOR WOMEN:
If women are employed separate latrines and urinals screened from those men and marked
in the vernacular in conspicuous letters "For Women Only" shall be provided on the scale
laid in Rule 6. Those for men shall be similarly marked "For men Only" a poster showing
the figure of a man or a woman shall also be exhibited at the entrance of latrines for the "
respective sex”. There shall be adequate supply of water close to the urinals and latrines.
8.0 LATRINES AND URINALS:
All latrines shall be provided with septic tanks or leach pits in case of small units. All the
latrines shall be kept in good sanitary conditions.
9.0 CONSTRUCTION OF LATRINES :
The inside walls shall be constructed of masonry of some suitable heat resisting non-
absorbent materials and shall be cement washed inside & outside at lest once a year. The
dates of cement washing shall be noted in a register maintained for this purpose and kept
available for inspection. Latrines will not be of a standard low than bore hole system and
should have thatched roofs.
320
CONTRACTOR NLUO
10.0 DISPOSAL FOR EXCRETA :
Unless otherwise arrange for by the local sanitary authority arrangements for proper
disposal of excreta shall be made by septic tank or leach pit duly approved by the engineer
and in conformity with the requirements of local public health authorities.
11.0 PROVISIONS OF SHELTER DURING REST :
At every work place there shall be provided free of cost two suitable sheds one for meals
and the other for rest separately for men and less than 3.5m from the floor level, to the
lowest part of the roof. The sheds should be roofed with at least thatch and mud flooring
will be provided with a dwarf wall around not less than 750mm. Sheds should be kept clean
and the space should be on the basis of at least 0.05 square meter per head.
12.0 CRECHE :
a. At every work place at which 50 or more women workers are ordinarily employed
there shall be provided two huts for the use of children under the age of 6 years
belonging to such women one hut shall be used for infants game and play and the
other as their bed room. The hut shall not be constructed on a lower standard than the
following :
i) Thatched roofs.
ii) Mud floors and walls.
iii) Planks spread over the mud floor & covered with matting.
The huts shall be provided with suitable and sufficient openings for light and ventilation.
There shall be adequate provision of sweepers to keep the place clean. There shall be two
daily in attendance. Sanitary utensils shall be provided to the satisfaction of the Health
Officer of the area concerned. The use of the hut shall be restricted to children, there
attendants and mothers of the children.
b. Where the number of women workers is more than 25 but less than 50 the Contractor
shall provide at least one hut and one dia to look after the children of women
workers.
c. The size of creche or cheches shall very according to the number of women workers.
d. The creche or creches shall be properly maintained and necessary equipments like toys
etc, shall be provided.
13.0 CANTEEN :
A cooked food canteen on a moderate scale shall be provided for the benefit of workers
wherever it is considered expedient.
321
CONTRACTOR NLUO
LIST OF MATERIALS OF APPROVED BRAND AND / OR MANUFACTURERS
SL.NO. DESCRIPTION MAKES
1. CEMENT ULTRATECH / ACC / LAFARZ / KONARK.
2. STEEL TISCON / VIZAG / SAIL
3. BRICK K.B. BRICK (75 KG/ CM2)
4. SAND SWEET RIVER SAND
5. METAL CRUSHER BROKEN GRANITE CHIPS
6. CHIPS CRUSHER BROKEN GRANITE CHIPS
7. WATER PROOF MATERIALS SIKA, PIDILITE / LATICRETE
8. CHOWKATH WELL SEASONED SAL WOOD CHOWKATH
9. FLUSH DOORS CENTURY / GREEN PLY / MAYUR GOLD
10. HARD WARE FITTING S.S. I.S.I. MARK MAT FINISH
11. GLASS MODIGUARD / SAINT GOBIN / AIS FLOAT/
SARAF
12. C.P.V.C. PIPE & FITTINGS AJAY FLOW GUARD / ASTRA FLOW GUARD
13. P.V.C. SEWERAGE PIPE 6 KG / SUPREME / PRINCE / FINOLEX
CM2
14. G.I. PIPE TATA HEAVY MEDIUM / JINDAL HISSAR - B
CLASS
15. ALL SANITARY FITTINGS PARRYWARE / HINDWARE / ROCA / KHOLER
16. HARDWARE / LOCKING GODREJ / HURRSSION
SYSTEM
17. FLOOR SPRING GODREJ / EVERITE / HARDWYN / DOOR SET
18. SCREW H.F. BRAND
19. LEAPING 1ST QUALITY TEAK WOOD
20. C.C. PAVERS GICO / CABLE STONES
21. MARBLE DUNGURI 2ND QUALITY
22. CERAMIC WALL TILE JOHNSON / KAJARIA / BELL / REGENCY
23. CERAMIC FLOOR TILE REGENCY / BELL / KAJARIA / CITY TILES /
RAK
24. ANTISKID FLOOR TILE REGENCY / BELL / RAK
25. VITRIFIED FLOOR TILE ASIAN / KAJARIA / REGENT / CITY TILES /
RAK
26. ALUMINIUM FRAME JINDAL / INDAL / OEL
27. ADHESIVE FEVICOL / JEEVAN JHOR / CENTURY
28. ALL G.I. FIXTURES (TEE, BED, HEAVY TYPE C.R. MAKE / UNIK MAKE
ELBOW ETC.)
29. FULL WAY VALVE
GUN METAL FULL WAY VALVE OF
LEADER MAKE / SANT MAKE
30. ALL H.C.I. PIPES
STANDARD I:S:I MARKED PIPES.
(SUSHILA MAKE / GAJA LAXMI MAKE
31. PLASTIC W.C. SHEET
HINDUSTAN / DIPLOMAT
322
CONTRACTOR NLUO
32. RAIN WATER PIPE 4 KG / CM2
SUPREME / PRINCE / FINOLEX
33. PRE-CAST TERRAZO TILE
NITCO / GICO / R.K. CEMENT BONDED TILE
34. PORTICO TILES
EUROCON / MULTIWYN / ULTRA
35. ALL C.P. FITTINGS
JAQUAR / MARC / CRABTREE / KOHLER /
ESSESS
36. FASTNER
HILTI / FISHER
37. ACRYLIC EMULSION PAINTS
ICI DULUX / BERGER / NEROLAC / ASIAN
38. PUTTY
BIRLLA / ASIAN / JK
39. EXTERIOR EMULSION PAINT
ICI DULUX / BERGER / ASIAN
40. WEATHER COAT PAINT
ICI DULUX / BERGER / ASIAN
41. ENAMEL PAINT
ICI DULUX / BERGER / ASIAN
42. VENEER
CENTURY / GREEN / AUSTIN
43. LAMINATE
CENTURY MICA / GREEN / MERINO / AUSTIN
44. B.W.R. BLOCK BOARD 19 MM
THICK CONFIRMING TO IS : CENTURY / GREEN / MAYUR GOLD / AUSTIN
1659 / 90
45. B.W.R. P.F. PLY 9 MM / 12 MM
THICK CONFIRMING TO IS : CENTURY / GREEN / MAYUR GOLD
303 / 1989
46. U.P.V.C WINDOW FRAME
DURO PLAST / FINESTA
47. P.P.R PIPE
PRINCE/SFMC
48. S.S.RAIL
OZONE/KICH/DQUNAX
49. S.T.P
AQUAFLUX / M.S. ENVIROTECH
50. FOUNTAIN
FLORA FOUNTAIN & AMUSEMENT /
AQUASCAPE & ENGG.
51. CHILDRENS PLAY UNIT &
GARDEN CHAIR FLORA FOUNTAIN & AMUSEMENT /
AQUASCAPE & ENGG.
Note: THE MATERIAL SPECIFICATION MAY CHANGE AS PER THE DESIGN.
All approved makes shall be ISI Marked
323
CONTRACTOR NLUO
LIST OF APPROVED MATERIALS
The contractor shall use materials in their works subject to inspection prior to
dispatch, by owner or his authorized representative of any materials, as deemed
necessary in accordance with the following list, all materials not otherwise specified
shall be in accordance with the latest Indian Standard Specification, where such
exists and prior approval of Owner / Architects. The contractor shall be bound to
offer sample of materials. Which are claimed to be conforming to I.S. specifications,
for testing at an approved Test Laboratory.
Contractor shall purchase all materials from the makers or their authorized stockists only.
Necessary documentary evidences must be produced to the Owner or their authorized
representative on demand. Contractor shall be bound to supply items of any make of the items as
per the choice of the Owner / Architect.
1. Acceptable Materials List (Internal)
1.1 Conduits - P.V.C.
a) Make : ISI Marked.
b) Accessories : Same make as that of conduit.
1.2 Wiring Cables - PVC Insulated Copper
a) Make : Finolex./ Havell‟s / Polycab
b) Voltage Grade : 1100 Volts & as per IS 694 / 1990
1.3 Distribution Boards
a) Make : Schneider (protect) / Legrand / Hovel‟s
b) Make of MCB‟s : Schneider (Protect) / Legrand / Havell‟s /
1.4 Wiring Accessories
a) 5A / 15A switches
sockets, antenna
sockets & telephone
sockets : Schneider (Clipsal - Opale) / Legrand /
Havell‟s / Crabtree (Athena)
b) Ceiling roses /
Angle holders : Cona / Anchor
324
CONTRACTOR NLUO
c) Switch plates /
Covers : Schneider (Clipsal - Opale) / Legrand /
Havell‟s / Crabtree (Athena)
(d) Switch box : Schneider (Clipsal-Opale) / Legrand / Havell‟s
1.5 Fitting & Fixtures :
a) Light fittings : Philips / Havell‟s /Pasolite
b) Bulb : Philips / Bajaj / CG Orpat
0
c) Fan : Crompton Greaves / Bajaj / USHA
d) Exhaust fan : Crompton Greaves / GE / Almonard
1.6 Telephone Wiring :
a) Telephone Cable : Finolex / Havell‟s / Delton
b) Tag Block : Finolex
1.7 Conduit Pipe : ISI Mark
Note : All approved makes shall be ISI Marked
325
CONTRACTOR NLUO
EQUIPMENT SCHEDULE AND LIST OF ACCEPTABLE MATERIALS MEDIUM
VOLTAGE SWITCHES GEAR AND TRANSFORMER
1. List of Acceptable Materials
1.1. The following makes of equipment / materials shall be acceptable under this contract.
(A) Medium Voltage Switch-gear
i) Air circuit breakers : Larasen & Toubro / Schneider
ii) Switch-fuse units : Larsen & Toubro / G.E. / SCHNEIDER / SIEMENS
iii) HRC fuses : G.E. / Larsen & Toubro / SIEMENS / Schneider
iv) Change over switch : Schneider / Larsen & Toubro / G.E.
v) M.C.C.B. : Larsen & Toubro / Schneider / G.E.
(B) Cables
i) H.T. Cable : ICC / CCI Gloster / Nicco / Universal / Torrent /
INCAB / RPG
ii) L.T. Cable : ICC / CCI / Gloster / NICCO / Universal / Torrent /
Havells / INCAB / RPG
(C) Meters & Indicators
i) Ammeter / Voltmeter /
P.F. Meters : AEP / UE / IMP / Automatic Elect.
ii) Kwh Meter : REMCO / GEC / SEMS / HPL / ALTHOM /
SECURE
iii) Frequency Meter : AEP / NIPPON / UE
iv) Indicating Lamps : Siemens / Larsen & Toubro / Binay / Concord.
(D) Instrument Transformers
i) H.T. Current Transformers : VE / EMS / KAPPA / AUTOMATIC ELECTRIC.
ii) H.T. Potential Transformers : Jyothi / VE / ESM.
iii) D.T. Current Transformers : ANP / KAPPA / ESM.
iv) Selector Switches : Larsen & Toubro / Kaycee / Thakoor.
326
CONTRACTOR NLUO
(E) Relays
i) Over current and earth fault relay : AREVA / Siemens / Larsen & Toubro.
ii) Power factor correction relay : NIPPO / MSIL / AVMACO / Siemens.
iii) AX relay : AREVA / ABB
(F) Miscellaneous
i) Cable gland : APT / ELECTROMAG
ii) Lugs : Dowels.
iii) Connectors : Indian Engineering Company / ELMEC / Schneider
iv) Capacitors : Khatau Junker / Voltas / BSES / MSIL / Powercap /
Crompton Greaves.
v) Contactors : Larsen & Toubro / Siemens / BCH / Schneider
vi) Starters : Larsen & Toubro / Siemens / BCH
N.B.: All material to be used should be of standard / make / specification as specified in
the Tender and only after approval of the Concerned Consultant/ NLUO.
Note: All approved makes shall be ISI Marked
327
CONTRACTOR NLUO
SPECIFICATION OF LIST OF APPROVED MAKE OF MATERIAL FIRE FIGHTING
All approved material should be ISI marked
FIRE FIGHTING EXECUTIVE AGENCIES - CEASE FIRE / EQUIVALENT
The executing agency should deploy educated, trained ( copy of certificates to be handed over to
the supervising agency ) and experienced Technicians / Supervisors on site with ID card. All the
staff / technicians working on site should be covered under all the statutory norms like ESIC, PF
and Insurance & should adhere to fire safety norms
S.No. Description Make of Material
1. GI/MS Pipes Jindal-Hissar / Tata
2. Malleable GI fittings VS/Unik
3. Butterfly/Check Valve Intervalve / Audco.
4. CP GM Ball Valve Zoloto/Leade/Neta
5. Air Release Valve Elems
6. Fire Hydrant Valve Newage / Winco
7. RRL Hose CRC / Eversafe
8. Short Branch Pipe Newage / Winco
9. GM Coupling Newage / Winco
10. Pumps Kirloskar/ Koel
11. Fire Extinguishers Ceasefire
12. Rubber Tube for Hose reel Jyoti/Maruti
13. Paint Asian Paints / Berger
14. Welding rods Esab
15. Fasteners(Galvanized) Hitech / GKW
16 Dash fastners/clamps Hitech / Chilly
17 Hose Box/Hose reel drum Eversafe
18 Anti vibration pads Easyflex / Dunlop
19 Mechnical Seal As per OEM Cert./Duramat
20 GM Siemese Connection Newage / Winco
21 Draw out Connection Newage / Winco
22 Pressure switch Indfoss / Danfoss
23 Pressure Gauge H.Guru / Fiebig
24. Cables/wire Polycab / Finolex
25. PVC conduit VIP / Universal
26 Manual Call point/Hooter Hochiki / Ceasefire
27. Response Indicator Hochiki / Ceasefire
28. Amplifier Ahuja /Philips
29. Microphone/speaker Philips/Ahuja
30 Switch Gear L&T
31. Battery Exide/Amco
32. LED PIC
33. “ Y “ Type Strainer Samsang/ H Sarkar
34. NRV Intervalve / Audco
328
CONTRACTOR NLUO
35. Sluice Valves Kartar/ H Sarkar
36. Sprinkler Tyco / Viking
37. Control Penal Venus / Load Controls
38. Cable Tray Profab / Paifab
39. Gate Valves Kartar / H Sarkar
40. Single / Double headed Yard hydrant valve Newage/ Winco
41. Short Branch Pipe Newage/ Winco
42. Convention Electronic Sounder Ceaefire / Hochiki
43. Diesel Engine Driven Main Pump Kirloskar/KOEL
44 Electric Motor Driven Jockey Pump Kirloskar
45. Electric Motor Driven Terrace Pump Kirloskar
46. Pump Control Panel Venus / Load Controls
47. Power/Control Cables Polycab/ Finolex
48. Y Strainer Samsang/ H Sarkar
49. Foot Valve Normex
50. Non Return Valve Intervalve
51. Ball Valve I Tap / Neta
52. Pressure switches Indfoss / Danfoss
53. Pressure Gauge H Guru . Fiebig
54. P.V.C.Pipes VIP
55. Anti Corrosive materials IWL
56. Branch Pipe Newage / Winco
57. Hose Reel Drum Eversafe
58. Fire Duct Shutter Standard
59. Fire Brigade Inlet Newage / Winco
60. Fire Extinguishers(Powder type) Ceasefire
61. Fire Extinguishers (Water type) Ceasefire
62. Fire Extinguishers (CO2 type) Ceasefire
63. Fire Extinguishers (Foam type) Ceasefire
64. Main Fire Alarm Control Panel Ceasefire / Ravel/GST – EN or UL
Approved
65. Manual Call Point Ceasefire/ Hochiki
66. Hooter Ceasefire / Hochiki
329
CONTRACTOR NLUO
LIST OF APPROVED MAKES OF MATERIALS FOR PLUMBING / SANITARY /
DRAINAGE
S. No. Details of Materials / Equipments Manufacturer's Name
1.Vitreous China Sanitary ware : Hindustan / Parry ware / ROCA/Koehler
2.C.P. Brass fittings : Jaguar(continental range)/
Marc Crabtree/ ROCA/Koehler
3. Manhole : App equal & ISI marked.
4.R.C.C pipe : App. Equivalent ISI marked
5. Gully traps : Perfect Potteries / Approved equal ISI marked
6. G.M. / Forged brass valves : Zoloto / Leader
7 .Check valve/Butterfly valve : SKS / C & R / Advance
8 .Paints : Asian Paints /Berger/Nerolac
9. Pressure Gauge : H Guru / Approved Equal ISI marked
10. Pumps : Kirloskar / Crompton/ Grundfos
11. UPVC Pipes : Supreme / Prince/Finolex
12. S. S. Sink : Neelkanth / Jayana/ Nerali
13. Fire Fighting Equipment : Minimax / Newage
14. CPVC Pipes : Astral flowgard / HIF Poly/Oriplast /
Ashirvad flowgard/Supreme
15. G.I Pipes : Jindal / Tata
330
CONTRACTOR NLUO
Note : All approved makes shall be ISI Marked
LIST OF APPROVED MAKES/BRANDS OF VARIOUS MATERIALS.
The materials to be used should be form the following list of approved makes/brands or of
equivalent quality as approved. Any other make/brand of a materials will also be allowed
to be used if approved by consultant.
1. FERRULES
A) LEADER B) JCSWR C) ACB D) NETA E) NEW F) HIMSON
G) HVI
2. WATER METER
A) CAPSTAN B) RAWCO C) DAS MASS
3. GATE VALVE & GLOBE VALVES
A) LEADER B) LUSTER C) KIRTI D) SANT
4. BALL COCKS
A) KINGSTON B) ARK C) LUSTER
5. POLYTHIENE FLOATS
A) COMMANDER CHAMPION B) COMMANDER-WATER BIRD
C) CMCOS BSJ. D) PEACOCK
6. MIRRORS
A) GOLDEN FISH B) SWAN
7. POLYTHIENE OVERFLOW PIPES
A) EMCO B) PEACOCK
8. CEMENT CONCRETE PIPES
A) INDIAN HUME PIPES CO. B) M.M. METAL & CO.
9. WATER PROFING COMPOUND FOR INTEGRAL CEMENT BASED WATER
PROOFING
A) IMPERUM-(2% BY WT. BY CEMENT) M/S SNOCEM INDIA LTD.,
B) CICI-(3% BY WT. OF CEMENT) M/S STRUCTURAL WATER PROOFING COL,
C) CHOCKSEY.
331
CONTRACTOR NLUO
TESTING OF MATERIALS & THEIR FREQUENCY
1.CEMENT (Confirming to IS-4031)
Test Required& Procedure Frequency Acceptance criteria
1 2 3
Determination of initial & Final setting One test for 50 tonnes on part there of . Initial setting time shall be less than 30minutes.
times
An apparatus called Via cat apparatus is
being used for determining setting time of
cement
Procedure- A cement paste of standard
consistency ( i.e with 0.85times water shall
be filled in Vicat model completely and
smooth off the surface of the paste making
it level with the top of the mould. During
the test, the block shall be kept at temp. of
270 +/- 2oC, in an atmosphere of at least
90% relative humidity and away from
draughts.
Initial setting time- Place the test block
confined in the mould and resting on the
nonporous plate under the rod bearing the
needle. Lower the needle gently in contract
with the surface of the test blocks. In the
beginning the needle will completely
pierce the test block, Repeat this
procedure, until the needle when brought
in contact with the test block and releases
as described above, fails to pierce the
block for 5 +/- 0.5 mm measured from the
bottom of the mould .The period elapsing Final setting time shall not be less than 600
between the time when water is added to minutes.
the cement and the time at which the
needle fails to pierce the test lock by 5 +/